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, click here.

Theology in general

The Triune God

Jesus Christ

The Holy Spirit

The Scriptures

The gospel

Grace and salvation

The church

Christian life

The future

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

The Triune God

Jesus Christ

The Holy Spirit

The Scriptures

The gospel

Grace and salvation

The church

Christian life

The future

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

The Triune God

Jesus Christ

The Holy Spirit

The Scriptures

The Gospel

Grace and Salvation

The Church

Christian Life

The Future