Public prayer is no evidence of piety: it is practiced by an abundance of hypocrites; but private prayer is a thing for which the hypocrite has no heart — and if he gives himself to it for a little time he soon finds it too hot and heavy a business for his soulless soul to persevere in, and he lets it drop. He will sooner perish than continue in private prayer. O for heart searchings about this! Do I draw near to God alone? Do I pray when no eye sees, when no ear hears? Do I make a conscience of private prayer? Is it a delight to pray? For I may gather that if I never enjoy private prayer I am one of those hypocrites who will not always call upon God. From a sermon by Charles Haddon Spurgeon entitled "The Touchstone of Godly Sincerity."