" This is why Peter explained that the purpose of sanctification is so that a believer is ready to evangelize at a moment’s notice. He writes, “But sanctify the Lord God in your hearts, and always be ready to give a defense to everyone who asks you a reason for the hope that is in you, with meekness and fear” (1 Pet. 3:15). "

― John F. MacArthur Jr. , Evangelism: How to Share the Gospel Faithfully (MacArthur Pastor's Library)