"EVANGELIST: ...I have sowed, and you have reaped; and the day is coming, when “both he that soweth, and they that reap, shall rejoice together,” John 4:36; that is, if you hold out: “for in due season ye shall reap, if ye faint not.” Gal. 6:9. The crown is before you, and it is an incorruptible one; “so run that ye may obtain it.” 1 Cor. 9:24-27. Some there be that set out for this crown, and after they have gone far for it, another comes in and takes it from them: “hold fast, therefore, that you have; let no man take your crown.” Rev. 3:11. You are not yet out of the gunshot of the devil; “you have not resisted unto blood, striving against sin.” Let the kingdom be always before you, and believe steadfastly concerning the things that are invisible. Let nothing that is on this side the other world get within you. And, above all, look well to your own hearts and to the lusts thereof; for they are “deceitful above all things, and desperately wicked.” Set your faces like a flint; you have all power in heaven and earth on your side."

-John Bunyan, "Pilgrim's Progress"

http://www.ccel.org/ccel/bunyan/pilgrim.iv.vi.html