40 Days of Discipleship is a three-volume, self-paced curriculum for advanced study in the doctrine and incarnational Trinitarian theology taught by Grace Communion International. Each volume is designed to be read in 40 days (about 2,000 words daily), covering the same ten categories (going deeper each time).
The First 40 Days
To read the articles in volume 1 online, click on the links below. To download them in one PDF document, click here. To purchase a printed version, click here. To download various other GCI publications in PDF, including translated versions, click here.
Theology in general
- Day 1: Why Bother With Theology? | Strong Theology vs. Weak Theology
- Day 2: Theology Affects the Way We Live | Theology in Perspective
- Day 3: Theology: What Difference Does It Make?
- Day 4: Answering Questions About Our Theology | Beware Theological Labels
The Triune God
- Day 5: An Introduction to God
- Day 6: The God Revealed in Jesus Christ (1st half)
- Day 7: The God Revealed in Jesus Christ (2nd half)
- Day 8: We Were Always on His Mind
Jesus Christ
- Day 9: Who Is This Man?
- Day 10: Is Jesus Really God? A Look at the Arian Controversy
- Day 11: What Jesus’ Incarnation Shows Us | Jesus, the Unexpected Messiah
- Day 12: Why Did Jesus Have to Die?
The Holy Spirit
- Day 13: The Holy Spirit
- Day 14: The Use and Misuse of Spiritual Gifts (1st half)
- Day 15: The Use and Misuse of Spiritual Gifts (2nd half)
- Day 16: The Holy Spirit Is the Personal Presence of God
The Scriptures
- Day 17: The Written Word of God
- Day 18: Bible Study Secrets
- Day 19: Inspiration, Authority, and Reliability of Scripture
- Day 20: The Importance of Doctrine | Incarnational Trinitarian Theology: A Brief Outline
The gospel
- Day 21: The Gospel: It’s Not Fair | The Message of Jesus
- Day 22: Preaching in the Book of Acts: Peter
- Day 23: Sharing the Good News
- Day 24: Good News for Ordinary People
Grace and salvation
- Day 25: Grace | Going on a Guilt Trip?
- Day 26: What Is Salvation?
- Day 27: Humans in the Image of God
- Day 28: Responding to God’s Grace in Our Relationships | Grace: A License to Sin?
The church
- Day 29: What Is the Church?
- Day 30: Six Functions of the Church (part 2)
- Day 31: Six Functions of the Church (part 3 to end) | Perfect Worship
- Day 32 Ministry Means Service
Christian life
- Day 33: Christian Life
- Day 34: Obeying God
- Day 35: Responding to Jesus With Prayer | John 14: In His Name
- Day 36: The Role of the Law in Christian Life
The future
- Day 37: The End Is a New Beginning
- Day 38: The Resurrection: Our Hope for the Future
- Day 39: We Are Living in the Last Days | Heaven
- Day 40: No One Knows When Christ Will Return
The Second 40 Days
To read the articles in volume 2 online, click on the links below. To download them in one PDF document, click here . To purchase a printed version, click here. To download various other GCI publications in PDF, click here.
Theology in general
- Day 1: An Introduction to Trinitarian Theology (parts 1-2)
- Day 2: An Introduction to Trinitarian Theology (parts 3-5a)
- Day 3: An Introduction to Trinitarian Theology (parts 5b-c)
- Day 4: An Introduction to Trinitarian Theology (parts 5d-7)
The Triune God
- Day 5: Responding to God With Faith
- Day 6: Who Is God? | Humanity’s Relationship With God
- Day 7: Knowing God
- Day 8: Who’s Afraid of God’s Judgment? | One in Three and Three in One
Jesus Christ
- Day 9: Jesus—Alive Forevermore! | Jesus Was Not Alone
- Day 10: Evidence of the Resurrection | The Power of the Resurrection
- Day 11: Why Jesus Gives Us Hope | Did You Kill Jesus Christ?
- Day 12: Two Truths We Learn From Jesus’ Death | Commemorating the Crucifixion
The Holy Spirit
- Day 13: Can You Hear the Holy Spirit? | Do You Have the Holy Spirit?
- Day 14: The Deity of the Holy Spirit
- Day 15: A Theology of the Holy Spirit (part 1)
- Day 16: A Theology of the Holy Spirit (part 2)
The Scriptures
- Day 17: God Speaks to Us! | Five Simple Rules for Bible Study
- Day 18: Scripture: God’s Gift (parts 1-2a)
- Day 19: Scripture, God’s Gift (part s2b-3)
- Day 20: Scripture, God’s Gift (part 4)
The gospel
- Day 21: Preaching in the Book of Acts: Paul
- Day 22: The Gospel Really Is Good News
- Day 23: Sharing Your Faith With the Unchurched | Heart Trouble
- Day 24: Baptism Pictures the Gospel
Grace and salvation
- Day 25: Too Much Grace? (1st half)
- Day 26: Too Much Grace? (2nd half)
- Day 27: Is Jesus the Only Way of Salvation?
- Day 28: Parable of the Lost Son
The church
- Day 29: Responding to God With Worship
- Day 30: Church: Some Assembly Required
- Day 31: Leadership in the Church: An Examination of Eight Words (part 1)
- Day 32: Leadership in the Church (part 2)
Christian life
- Day 33: New Life in Christ
- Day 34: The Goal of the Christian Life | The Purpose of Blessings
- Day 35: Trials and Faith | Life in Christ: Living Like a Christian
- Day 36: Jesus Helps Us in Everyday Trials
The future
- Day 37: How to Interpret Prophecy
- Day 38: A Balanced Approach to Bible Prophecy
- Day 39: God’s Wrath
- Day 40: The Coming of the Lord | Here He Comes, Ready or Not
The Third 40 Days
To read the articles in volume 3 online, click on the links below. To download them in one PDF document, click here. To purchase a printed version, click here. To download various other GCI publications in PDF, click here.
Theology in general
- Day 1: What’s So Special About Trinitarian Theology? |Beware Theological Labels | Questions & Answers About Trinitarian Theology (part 1)
- Day 2: Questions & Answers About Trinitarian Theology (part 2)
- Day 3: Theology as a Framework for Life and Ministry | Foundations of Theology for GCI (part 1)
- Day 4: Foundations of Theology for GCI (part 2)
The Triune God
- Day 5: The Trinity: Just a Doctrine?
- Day 6: Perichoresis – What’s That? | Is the Doctrine of the Trinity in the Bible?
- Day 7: Predestination: Does God Choose Your Fate? (part 1)
- Day 8: Predestination: Does God Choose Your Fate? (part 2)
Jesus Christ
- Day 9: Jesus – The Complete Salvation Package | Christ’s Resurrection – Our Hope of Salvation
- Day 10: The Incarnation: The Greatest Miracle | The Birth of Jesus: A Story of Shame
- Day 11: Appreciating Christ’s Sacrifice | It Isn’t Just About How He Died
- Day 12: Don’t Cry for Jesus
The Holy Spirit
- Day 13: A Theology of the Holy Spirit (part 3)
- Day 14: A Theology of the Holy Spirit (part 4a)
- Day 15: A Theology of the Holy Spirit (part 4b)
- Day 16: A Theology of the Holy Spirit (part 5)
The Scriptures
- Day 17: Scripture, God’s Gift (part 5)
- Day 18: Scripture, God’s Gift (part 6)
- Day 19: Be Devoted to Scripture
- Day 20: Timeless Truths in Cultural Clothes
The Gospel
- Day 21: What Jesus Said About Himself
- Day 22: Good News in an Alabaster Jar
- Day 23: Marketing the Gospel?
- Day 24: A Theological Look at Evangelism
Grace and Salvation
- Day 25: Do We Teach Universalism? | Why Would Anyone Want to Be a Christian?
- Day 26: Grace and Obedience
- Day 27: Relationship With Christ
- Day 28: A New Look at the Good Samaritan | Grace From First to Last
The Church
- Day 29: Responding to the Church With Teamwork | The Three-Fold Meaning of the Lord’s Supper
- Day 30: Lay Members’ Role in the Early Church
- Day 31: Upward, Inward and Outward in Words and Deeds
- Day 32: Leadership in the Church | The Pastor’s Calling
Christian Life
- Day 33: Sanctification | Tell Peter
- Day 34: Our Relationship With Jesus Christ
- Day 35: Trusting God With the Problem of Sin (1st half)
- Day 36: Trusting God With the Problem of Sin (2nd half)