Though he didn’t belong to the Puritan era, Gerstner stood firm for the authority of Scripture and the heart of the gospel when many churches were drifting from sound teaching. Rooted in the United Presbyterian Church of North America, he became a leading voice in reviving interest in the theology of Puritan Jonathan Edwards.

 Whether writing detailed studies or short, practical guides, Gerstner had one goal: to make deep truth clear and accessible. His life’s work still inspires believers to hold fast to God’s Word and live it out with conviction.