I have always considered that the sum and substance of the gospel lies in that word Substitution,—Christ standing in the stead of man. If I understand the gospel, it is this: I deserve to be lost for ever; the only reason why I should not be damned is, that Christ was punished in my stead, and there is no need to execute a sentence twice for sin. On the other hand, I know I cannot enter Heaven unless I have a perfect righteousness; I am absolutely certain I shall never have one of my own, for I find I sin every day; but then Christ had a perfect righteousness, and He said, “There, poor sinner, take My garment, and put it on; you shall stand before God as if you were Christ, and I will stand before God as if I had been the sinner; I will suffer in the sinner’s stead, and you shall be rewarded for works which you did not do, but which I did for you.” I find it very convenient every day to come to Christ as a sinner, as I came at the first. “You are no saint,” says the devil. Well, if I am not, I am a sinner, and Jesus Christ came into the world to save sinners. Sink or swim, I go to Him; other hope I have none. By looking to Him, I received all the faith which inspired me with confidence in His grace; and the word that first drew my soul—”Look unto Me,”—still rings its clarion note in my ears. There I once found conversion, and there I shall ever find refreshing and renewal.
– C. H. Spurgeon