In the concluding verse of 1 Timothy 4, Paul instructs Timothy, "Keep a close watch on yourself and on the teaching. Persist in this, for by so doing you will save both yourself and your hearers." What did he mean by these words? Alistair Begg begins an examination of the answer by looking at the chapter's opening verses, which outline the apostacy Paul warned about, how it would happen, by whom it would happen, and what its teaching would involve.