In these pages, you’ll learn the most compelling arguments in favor of Christianity. Not only that, but you’ll also find out how to respond to the most popular objections to those arguments. You’ll discover that On Guard is solidly factual, winsomely personal, consistently practical, and ultimately convincing in its presentation of the case for Christianity.

Lee Strobel, former skeptic and author of The Case for Christ and The Case for the Real Jesus
On Guard Study Guide now available
On Guard: Defending Your Faith with Reason and Precision, by William Lane Craig
order On Guard

On Guard: Defending Your Faith with Reason and Precision
by William Lane Craig

William Lane Craig
Do you worry that someone will ask you a question about your faith that you can't answer?

Have you tried to learn how to defend your faith but gotten lost in confusing language and philosophy?

Do you struggle with times of spiritual doubt yourself?.
This concise training manual by a renowned scholar is filled with illustrations, sidebars, and memorizable steps to help you stand your ground and defend your faith with reason and precision. In his engaging style, Dr. William Lane Craig offers four arguments for God's existence, defends the historicity of Jesus' personal claims and resurrection, addresses the problem of suffering, and shows why religious relativism doesn't work. Along the way, he shares his own story of following God's call.

This one-stop, how-to-defend-your-faith manual will equip you to advance faith conversations deliberately, applying straightforward, cool-headed arguments. You will discover not just what you believe, but why you believe—and how being On Guard with the truth has the power to change lives forever.
What people are saying about On Guard and William Lane Craig
“In these pages, you’ll learn the most compelling arguments in favor of Christianity. Not only that, but you’ll also find out how to respond to the most popular objections to those arguments. You’ll discover that On Guard is solidly factual, winsomely personal, consistently practical, and ultimately convincing in its presentation of the case for Christianity.”
Lee Strobel, former skeptic and author of The Case for Christ and The Case for the Real Jesus
“There is probably no greater defender of the Christian faith alive today than William Lane Craig. On Guard is Craig’s introduction to the wealth of information, logic, and evidence that powerfully point to the truth of our Christian beliefs. Read it to deepen your own faith and to embolden your confidence in sharing that faith with others.”
Mark Mittelberg, author of Faith Path, Choosing Your Faith, and coauthor of The Unexpected Adventure
On Guard is an excellent summation of how the Christian faith makes sense of the real world in which we all live. ‘Speaking the truth in love,’ once again William Lane Craig proves we don’t have to be abrasive to be persuasive.”
Jim Thomas, pastor at the Village Chapel, Nashville, and author of Coffeehouse Theology and Streetwise Spirituality
“William Lane Craig is arguably one of the finest Christian philosophers of our time. His knowledge and skill have placed him on platforms on every continent, engaging the most notable skeptics in dialogue and debate.”
Ravi Zacharias, founder and chairman of Ravi Zacharias International Ministries
“It is hard to overstate the impact that William Lane Craig has had for the cause of Christ. He is simply the finest Christian apologist of the last half century, and his academic work justifies ranking him among the top 1 percent of practicing philosophers in the Western world. Besides that, he is a winsome ambassador for Christ, an exceptional debater, and a man with the heart of an evangelist. I know him well and can say that he lives a life of integrity and lives out what he believes. I do not know of a single thinker who has done more to raise the bar of Christian scholarship in our generation than Craig. He is one of a kind and I thank God for his life and work.”
J. P. Moreland, distinguished professor of philosophy at Talbot School of Theology