In the early centuries of the church’s existence, Christian apologists would sometimes appeal to the distinctively holy lives of Christians as evidence for the truth of Christianity. Would such an appeal be of any use today? According to numerous surveys, the behavior of professing Christians is not discernibly different from the behavior of those who profess other religions or no religion at all. The phrase one often hears on the lips of pagans who observe contemporary Christian behavior is: “The church is full of hypocrites.” This should not be. We worship a holy God who calls His people to be holy and who has provided the means by which they may be holy.
The problem of lax and hypocritical Christianity is not a new one, and one of the best treatments of the entire subject is a classic written by J.C. Ryle (1816–1900), who served as the Anglican Bishop of Liverpool for twenty years. Ryle was a deeply committed and non-compromising evangelical Christian. In fact, Charles Spurgeon referred to him as an “evangelical champion.” His book Holiness has been reprinted numerous times since its original publication in 1879. It is deservedly considered a Christian classic on the subject of sanctification. It ranks up there with the work of John Owen on the mortification of sin.