A good act can become evil through circumstances

II. Good Acts and Evil Acts

1755 A morally good act requires the goodness of the object, of the end, and of the circumstances together. An evil end corrupts the action, even if the object is good in itself (such as praying and fasting "in order to be seen by men"). The object of the choice can by itself vitiate an act in its entirety. There are some concrete acts - such as fornication - that it is always wrong to choose, because choosing them entails a disorder of the will, that is, a moral evil.

1756 It is therefore an error to judge the morality of human acts by considering only the intention that inspires them or the circumstances (environment, social pressure, duress or emergency, etc.) which supply their context. There are acts which, in and of themselves, independently of circumstances and intentions, are always gravely illicit by reason of their object; such as blasphemy and perjury, murder and adultery. One may not do evil so that good may result from it.

Prologue
- I. The life of man - to know and love God
- II. Handing on the Faith: Catechesis
- III. The Aim and Intended Readership of the Catechism
- IV. Structure of this Catechism
- V. Practical Directions for Using this Catechism
- VI. Necessary Adaptations
- Section One I Believe - We Believe
  - Chapter One Man's Capacity For God
    - Man's Capacity For God
    - Ii. Ways Of Coming To Know God
    - Iii. The Knowledge Of God According To The Church
    - Iv. How Can We Speak About God?
    - In Brief
    - Article 1 The Revelation Of God
      - The Revelation Of God
      - II. The Stages Of Revelation
      - III. Christ Jesus -- Mediator And Fullness Of All Revelation25
      - In Brief
      - The Transmission Of Divine Revelation
      - I. The Apostolic Tradition
      - II. The Relationship Between Tradition And Sacred Scripture
      - III. The Interpretation Of The Heritage Of Faith
      - In Brief
      - Sacred Scripture
      - II. Inspiration And Truth Of Sacred Scripture
      - III. The Holy Spirit, Interpreter Of Scripture
      - IV. The Canon Of Scripture
      - V. Sacred Scripture In The Life Of The Church
      - In Brief
      - Article 1 I Believe
        
        I Believe
        
        II. I Know Whom I Have Believed16
        
        III. The Characteristics Of Faith
        
        We Believe
        
        I. Lord, Look Upon The Faith Of Your Church
        
        II. The Language Of Faith
        
        III. Only One Faith
        
        In Brief
        
        The Credo
        
        Chapter One I Believe In God The Father
        
        Article 1 I Believe In God The Father Almighty, Creator Of Heaven And Earth
        
        I Believe In God The Father Almighty, Creator Of Heaven And Earth
        
        Paragraph 2. The Father
        
        Paragraph 3. The Almighty
        
        Paragraph 4. The Creator
        
        Paragraph 5. Heaven And Earth
        
        Paragraph 6. Man
        
        Paragraph 7. The Fall
        
        Article 2 And In Jesus Christ, His Only Son, Our Lord
        
        Article 2
        
        II. Christ
        
        III. The Only Son Of God
        
        IV. Lord
        
        In Brief
        
        He Was Conceived By The Power Of The Holy Spirit, And Was Born Of The Virgin Mary
        
        Paragraph 2. Conceived By The Power Of The Holy Spirit And Born Of The Virgin Mary
        
        Paragraph 3. The Mysteries Of Christ's Life
        
        Jesus Christ Suffered Under Pontius Pilate, Was Crucified, Died And Was Buried
        
        Paragraph 1. Jesus And Israel
        
        Paragraph 2. Jesus Died Crucified
        
        Paragraph 3. Jesus Christ Was Buried
        
        HE DESCENDED INTO HELL. On The Third Day He Rose Again
        
        Paragraph 1. Christ Descended Into Hell
        
        Paragraph 2. On The Third Day He Rose From The Dead
        
        He Ascended Into Heaven And Is Seated At The Right Hand Of The Father
        
        In Brief
        
        From Thence He Will Come Agaln To Judge The Living And The Dead
        
        II. To Judge The Living And The Dead
        
        In Brief
        
        Article 8 I Believe In The Holy Spirit
        
        Article 8
        
        I. The Joint Mission Of The Son And The Spirit
        
        II. The Name, Titles, And Symbols Of The Holy Spirit
        
        III. God's Spirit And Word In The Time Of The Promises
        
        IV. The Spirit Of Christ In The Fullness Of Time
        
        V. The Spirit And The Church In The Last Days
        
        In Brief
        
        I Believe In The Holy Catholic Church
        
        Paragraph 1. The Church In God's Plan
        
        Paragraph 2. The Church - People Of God, Body Of Christ, Temple Of The Holy Spirit
        
        Paragraph 3. The Church Is One, Holy, Catholic, And Apostolic
        
        Paragraph 4. Christ's Faithful - Hierarchy, Laity, Consecrated Life
        
        Paragraph 5. The Communion Of Saints
        
        Paragraph 6. Mary - Mother Of Christ, Mother Of The Church
        
        I Believe In The Forgiveness Of Sins
        
        I. One Baptism For The Forgiveness Of Sins
        
        II. The Power Of The Keys
        
        I Believe In The Resurrection Of The Body
        
        I. Christ's Resurrection And Ours
        
        II. Dying In Christ Jesus
        
        In Brief
        
        I Believe In Life Everlasting
        
        I. The Particular Judgment
        
        II. Heaven
        
        III. The Final Purification, Or Purgatory
        
        IV. Hell
        
        V. The Last Judgment
        
        VI. Hope Of The New Heaven And The New Earth
        
        In Brief
        
        Amen
        
        Section One The Sacramental Economy
        
        Chapter One The Paschal Myster On The Age Of The Church
        
        Article 1 The Liturgy - Work Of The Holy Trinity
        
        The Liturgy - Work Of The Holy Trinity
        
        II. Christ's Work In The Liturgy
        
        III. The Holy Spirit And The Church In The Liturgy
        
        In Brief
        
        The Paschal Mystery In The Church's Sacraments
        
        I. The Sacraments Of Christ
        
        II. The Sacraments Of The Church
        
        III. The Sacraments Of Faith
        
        IV. The Sacraments Of Salvation
        
        V. The Sacraments Of Eternal Life
        
        In Brief
        
        Article 1 Celebrating The Church's Liturgy
        
        Celebrating The Church's Liturgy
        
        II. How Is The Liturgy Celebrated?
        
        III. When Is The Liturgy Celebrated?
        
        IV. Where Is The Liturgy Celebrated?
        
        In Brief
        
        Liturgical Diversity And The Unity Of The Mystery
        
        In Brief
        
        Chapter One The Sacraments Of Christian Initiation
        
        Article 1 The Sacrament Of Baptism
        
        The Sacrament Of Baptism
        
        I. What Is This Sacrament Called?
        
        II. Baptism In The Economy Of Salvation
        
        III. How Is The Sacrament Of Baptism Celebrated?
        
        IV. Who Can Receive Baptism?
        
        V. Who Can Baptize?
        
        VI. The Necessity Of Baptism
        
        VII. The Grace Of Baptism
        
        In Brief
        
        The Sacrament Of Confirmation
        
        I. Confirmation In The Economy Of Salvation
        
        II. The Signs And The Rite Of Confirmation
        
        III. The Effects Of Confirmation
        
        IV. Who Can Receive This Sacrament?
        
        V. The Minister Of Confirmation
        
        In Brief
        
        The Sacrament Of The Eucharist
        
        I. The Eucharist - Source And Summit Of Ecclesial Life
        
        II. What Is This Sacrament Called?
        
        III. The Eucharist In The Economy Of Salvation
        
        IV. The Liturgical Celebration Of The Eucharist
        
        V. The Sacramental Sacrifice Thanksgiving, Memorial, Presence
        
        VI. The Paschal Banquet
        
        VII. The Eucharist - Pledge Of The Glory To Come
        
        In Brief
        
        Article 4 The Sacrament Of Penance And Reconciliation
        
        The Sacrament Of Penance And Reconciliation
        
        I. What Is This Sacrament Called?
        
        II. Why A Sacrament Of Reconciliation After Baptism?
        
        III. The Conversion Of The Baptized
        
        IV. Interior Penance
        
        V. The Many Forms Of Penance In Christian Life
        
        VI. The Sacrament Of Penance And Reconciliation
        
        VII. The Acts Of The Penitent
        
        VIII. The Minister Of This Sacrament
        
        IX. The Effects Of This Sacrament
        
        X. Indulgences
        
        XI. The Celebration Of The Sacrament Of Penance
        
        In Brief
        
        The Anointing Of The Sick
        
        I. Its Foundations In The Economy Of Salvation
        
        II. Who Receives And Who Administers This Sacrament?
        
        III. How Is This Sacrament Celebrated?
        
        IV. The Effects Of The Celebration Of This Sacrament
        
        V. Viaticum, The Last Sacrament Of The Christian
        
        In Brief
        
        Article 6 The Sacrament Of Holy Orders
        
        Article 6
        
        I. Why Is This Sacrament Called Orders?
        
        II. The Sacrament Of Holy Orders In The Economy Of Salvation
        
        III. The Three Degrees Of The Sacrament Of Holy Orders
        
        IV. The Celebration Of This Sacrament
        
        V. Who Can Confer This Sacrament?
        
        VI. Who Can Receive This Sacrament?
        
        VII. The Effects Of The Sacrament Of Holy Orders
        
        In Brief
        
        The Sacrament Of Matrimony
        
        I. Marriage In God's Plan
        
        II. The Celebration Of Marriage
        
        III. Matrimonial Consent
        
        IV. The Effects Of The Sacrament Of Matrimony
        
        V. The Goods And Requirements Of Conjugal Love
        
        VI. The Domestic Church
        
        In Brief
        
        Article 1 Sacramentals
        
        Other Liturgical Celebrations
        
        In Brief
        
        Christian Funerals
        
        I. The Christian's Last Passover
        
        II. The Celebration Of Funerals
        
        Section One Man's Vocation Life In The Spirit
        
        Chapter One The Dignity Of The Human Person
        
        Article 1 Man: The Image Of God
        
        Man: The Image Of God
        
        In Brief
        
        Our Vocation To Beatitude
        
        II. The Desire For Happiness
        
        III. Christian Beatitude
        
        In Brief
        
        Man's Freedom
        
        I. Freedom And Responsibility
        
        II. Human Freedom In The Economy Of Salvation
        
        In Brief
        
        The Morality Of Human Acts
        
        I. The Sources Of Morality
        
        II. Good Acts And Evil Acts
        
        In Brief
        
        The Morality Of The Passions
        
        I. Passions
        
        II. Passions And Moral Life
        
        In Brief
        
        Moral Conscience
        
        I. The Judgment Of Conscience
        
        II. The Formation Of Conscience
        
        III. To Choose In Accord With Conscience
        
        IV. Erroneous Judgment
        
        In Brief
        
        The Virtues
        
        I. The Human Virtues
        
        II. The Theological Virtues
        
        III. The Gifts And Fruits Of The Holy Spirit
        
        In Brief
        
        Sin
        
        II. The Definition Of Sin
        
        III. The Different Kinds Of Sins
        
        IV. The Gravity Of Sin: Mortal And Venial Sin
        
        V. The Proliferation Of Sin
        
        In Brief
        
        Article 1 The Person And Society
        
        The Person And Society
        
        II. Conversion And Society
        
        In Brief
        
        Participation In Social Life
        
        II. The Common Good
        
        III. Responsibility And Participation
        
        In Brief
        
        Social Justice
        
        I. Respect For The Human Person
        
        II. Equality And Differences Among Men
        
        III. Human Solidarity
        
        In Brief
        
        Article 1 The Moral Law
        
        The Moral Law
        
        I. The Natural Moral Law
        
        II. The Old Law
        
        III. The New Law Or The Law Of The Gospel
        
        In Brief
        
        Grace And Justification
        
        II. Grace
        
        III. Merit
        
        IV. Christian Holiness
        
        In Brief
        
        The Church, Mother And Teacher
        
        I. Moral Life And The Magisterium Of The Church
        
        II. The Precepts Of The Church
        
        III. Moral Life And Missionary Witness
        
        In Brief
        
        Chapter One You Shall Love The Lord Your God Will All Your Heart, And With All Your Soul, And With All Your Mind
        
        Article 1 The First Commandment
        
        The First Commandment
        
        I. You Shall Worship The Lord Your God And Him Only Shall You Serve
        
        II. Him Only Shall You Serve
        
        III. You Shall Have No Other Gods Before Me
        
        IV. You Shall Not Make For Yourself A Graven Image . . .
        
        In Brief
        
        The Second Commandment
        
        I. The Name Of The Lord Is Holy
        
        II. Taking The Name Of The Lord In Vain
        
        III. The Christian Name
        
        In Brief
        
        The Third Commandment
        
        I. The Sabbath Day
        
        II. The Lord's Day
        
        In Brief
        
        Article 4 The Fourth Commandment
        
        Article 4
        
        I. The Family In God's Plan
        
        II. The Family And Society
        
        III. The Duties Of Family Members
        
        IV. The Family And The Kingdom
        
        V. The Authorities In Civil Society
        
        In Brief
        
        The Fifth Commandment
        
        I. Respect For Human Life
        
        II. Respect For The Dignity Of Persons
        
        III. Safeguarding Peace
        
        In Brief
        
        The Sixth Commandment
        
        I. Male And Female He Created Them . . .
        
        II. The Vocation To Chastity
        
        III. The Love Of Husband And Wife
        
        IV. Offenses Against The Dignity Of Marriage
        
        In Brief
        
        The Seventh Commandment
        
        I. The Universal Destination And The Private Ownership Of Goods
        
        II. Respect For Persons And Their Goods
        
        III. The Social Doctrine Of The Church
        
        IV. Economic Activity And Social Justice
        
        V. Justice And Solidarity Among Nations
        
        VI. Love For The Poor
        
        In Brief
        
        The Eighth Commandment
        
        I. Living In The Truth
        
        II. To Bear Witness To The Truth
        
        III. Offenses Against Truth
        
        IV. Respect For The Truth
        
        V. The Use Of The Social Communications Media
        
        VI. Truth, Beauty, And Sacred Art
        
        In Brief
        
        The Ninth Commandment
        
        I. Purification Of The Heart
        
        II. The Battle For Purity
        
        In Brief
        
        The Tenth Commandment
        
        I. The Disorder Of Covetous Desires
        
        II. The Desires Of The Spirit
        
        III. Poverty Of Heart
        
        IV. I Want To See God
        
        In Brief
        
        Section One Prayer In The Christian Life
        
        Chapter One The Revelation Of Prayer - The Universal Call To Prayer
        
        Article 1 In The Old Testament
        
        In The Old Testament
        
        In Brief
        
        In The Fullness Of Time
        
        In Brief
        
        In The Age Of The Church
        
        I. Blessing And Adoration
        
        II. Prayer Of Petition
        
        III. Prayer Of Intercession
        
        IV. Prayer Of Thanksgiving
        
        V. Prayer Of Praise
        
        In Brief
        
        Article 1 At The Wellsprings Of Prayer
        
        At The Wellsprings Of Prayer
        
        In Brief
        
        The Way Of Prayer
        
        In Brief
        
        Guides For Prayer
        
        In Brief
        
        Article 1 Expressions Of Prayer
        
        Expressions Of Prayer
        
        II. Meditation
        
        III. Contemplative Prayer
        
        In Brief
        
        The Battle Of Prayer
        
        I. Objections To Prayer
        
        II. Humble Vigilance Of Heart
        
        III. Filial Trust
        
        IV. Perservering In Love
        
        The Prayer Of The Hour Of Jesus
        
        In Brief
        
        article 1 the summary of the whole gospel
        
        article 2 our father who art in heaven
        
        article 3 the seven petitions
        
        article 4 the final doxolgy