"Perhaps I speak to an attentive hearer who is not converted at all. Friend, I have the same thing to say to you. You also may follow Christ, and then he can use you, even you. I do not know but that he has brought you to this place that you may be saved, and that in after years he may make you speak for his name and glory. Remember how he called Saul of Tarsus, and made him the apostle of the Gentiles. Reclaimed poachers make the best gamekeepers; and saved sinners make the ablest preachers. Oh, that you would run away from your old master to-night, without giving him a minute's notice; for if you give him any notice, he will hold you. Hasten to Jesus, and say, 'Here is a poor runaway slave! My Lord, I bear the fetters still upon my wrists. Wilt thou set me free, and make me thine own?' Remember, it is written, "Him that cometh to me I will in no wise cast out." Never runaway slave came to Christ in the middle of the night without his taking him in; and he never gave one up to his old master. If Jesus make you free you shall be free indeed. Flee away to Jesus, then, on a sudden. May his good Spirit help you, and he will by-and-by make you a winner of others to his praise! God bless you. Amen." (Source: How to Become Fishers of Men)
Recommended reading:
You can also listen to an audio recording of The Forgotten Spurgeon on Sermonaudio.com: