"For unless your hearts are free from worldly hopes and worldly fears, you never will speak boldly, as you ought to speak. The good old Puritans, I believe, never preached better than when in danger of being taken to prison as soon as they had finished their sermon. And however the church may be at peace now, yet I am persuaded, unless you go forth with the same temper, you will never preach with the same demonstration of the Spirit and of power. Study, therefore, my brethren,-I beseech you by the mercies of God in Christ Jesus,-study your hearts as well as books; ask yourselves again and again whether you would preach for Christ, if you were sure to lay down your lives for so doing?"
- George Whitefield (1714-1770)