Apologetics is the defense of the Christian faith. This discipline was crucially important to J. Gresham Machen. Today, Stephen Nichols explores Machen’s approach to exposing unbiblical teaching and defending the truth of the gospel. For your donation of any amount, request J. Gresham Machen’s classic book, Christianity and Liberalism. You’ll also receive Stephen Nichols’ teaching series on DVD, plus lifetime digital access to the messages and study guide: https://gift.renewingyourmind.org/3976/donate Live outside the U.S. and Canada? You can get Christianity and Liberalism as an ebook, plus lifetime digital access to the teaching series and study guide, for a donation of any amount: https://www.renewingyourmind.org/global For a limited time, receive the lowest rate when you register for Ligonier’s 2026 National Conference: https://www.ligonier.org/2026   Meet Today’s Teacher:   Stephen Nichols is president of Reformation Bible College, chief academic officer for Ligonier Ministries, and a Ligonier Ministries teaching fellow. He is host of the podcasts 5 Minutes in Church History and Open Book.   Meet the Host:   Nathan W. Bingham is vice president of ministry engagement for Ligonier Ministries, executive producer and host of Renewing Your Mind, and host of the Ask Ligonier podcast. Renewing Your Mind is a donor-supported outreach of Ligonier Ministries. Explore all of our podcasts: https://www.ligonier.org/podcasts