Ah! brethren, what hard, iron hearts you must have, when all that man can do will not melt them. Your hearts are too hard for us; and we have to, go back weeping to our Lord, saying: “Who hath believed our report?” In all other things we could persuade you by arguments. If your bodies were sick, we could persuade you to send for the physician; if your estate were entangled, we could persuade you to be diligent for your family—oh! how readily you would obey us; but when we demonstrate that you are the heirs, soul and body, of an eternal hell, you will not awake for it all. Even if we could show you the Lord Jesus Christ himself—the bleeding, beseeching Saviour—your wicked hearts would not cleave to him. You need Him that made your hearts, to break and bend your hearts. Will you not, each of you. go away, then, beating on the breast, and saying: “God, be merciful to me, a sinner?”
Robert Murray McCheyne, The Works of the Late Rev. Robert Murray McCheyne, Vol. 2 (New York: Robert Carter, 1847), 380.