WHAT IS FAITH?: Annotated Edition

Annotated Edition – J. Gresham Machen

What does it really mean to believe?

In this powerful and timeless work, renowned theologian J. Gresham Machen explains the true nature of biblical faith—not just as belief in facts, but as personal trust in the Lord Jesus Christ. This annotated edition simplifies Machen’s original language for today’s readers without changing his meaning, making his arguments clear and engaging for students, laypeople, and pastors alike.

Machen boldly defends the truth of the Gospel against modern errors. He shows why real faith must be grounded in Scripture, focused on Christ, and rooted in the historical facts of His death and resurrection. Along the way, he answers pressing questions: Is faith opposed to reason? How does knowledge relate to salvation? What makes Christianity unique among all religions?

This edition preserves Machen’s passionate clarity while offering helpful updates for modern readers—replacing outdated terms, correcting grammar, and explaining key theological ideas. With added paragraph spacing and a glossary, it’s perfect for classroom use, church study, or personal devotion.

Faith is not a leap into the dark—it is trusting the One who brings light.