We have only waded ankle-deep in faith as yet. We thought the water very cold and chill when we timorously ventured in; but having tried it up to the ankles, we have found it good and pleasant. Let us advance until we are breast-deep, yea, and deeper. Blessed is that man who gets his feet off the bottom, and swims in the stream where he has no hope but his God, and no confidence and no helper but the Invisible One who sustaineth all things. Faith cries, “Trust me, my son, to make you preach better. Have more enterprise. Be more daring. Do not fight your own battle in the church-meeting, leave it to your God; trust all with him. Do not be afraid to go and speak to that foul-mouthed man; I will give you the right word to say to him. Trust me, and go with prudence but with zeal into the darkest haunts of vice. Find out the worst of men, and seek their salvation. There is nothing you cannot do if you will but trust in God.” Brother, your failure, if you fail, will begin in your faith. The air says to the eagle, “Trust me; spread thy broad wings; I will bear thee up to the sun. Only trust me. Take thy foot from off yon rock which thou canst feel beneath thee. Get away from it, and be buoyed up by the unseen element.” My brethren, eaglets of Heaven, mount aloft, for God invites you. Mount! You have but to trust him. An unknown glory rests upon him, and the radiance thereof shall come upon you if you only know how to trust him.
C.H. Spurgeon, An All-Round Ministry, 28-29