There is a reason some books endure, and The God Who Is There is truly a classic in Christian thought. If you're interested in learning how to reach people in our culture here's your book. However, this book is philosophically heavy, especially when Schaeffer explains how the culture arrived at its current state (to oversimplify: faith divided from reason) during the first half of the book. Indeed, without a creator, Schaeffer expertly illustrates how mankind is in constant disrepair because the individual has no reason to believe anything has meaning, even his own life.

Here are a couple of superb quotes:

Man today seeks to deflect this tension [the real world versus his presuppositions] by saying that he is no more than a machine. If he were no more than a machine he would fin no difficulty in proceeding step by step down the line of logical conclusion of his non-Christian presuppositions. But man is not a machine, even if he says he is. (p. 124).

Before a man is ready to become a Christian, he must have a proper understanding of truth, weather he has fully analyses his concept of truth or not. (p. 143)