But, alas! say you, I cannot get away my filthiness; I cannot put away my lusts and idols. Oh! what mean you, poor soul? Do you think to put away your own sin, and take God’s work out of his hand? I tell you, in his great name, he never laid such an intolerable burden upon you; for, the cleansing from all your filthiness, and from all your idols, is harder work than the making of a world. It is only the Lamb of God that taketh away the sin of the world.
All your work is to put the work in his hand. Many think they cannot come to Christ, till first they put away all their sin, and give up with all their lusts; but all your pains, before you come to the blood of Christ, will be like pouring oil upon the fire, that will inflame it the more. Therefore, welcome, welcome a promising God, saying, “From all your filthiness, and from all your idols will I cleanse you;” for I have got clean water in my hand for that purpose: “I have found a ransom.” By the blood of the covenant, I will send forth these prisoners out of the pit wherein there is no water; but here is water enough.
--Ralph Erskine, “Sermon LXXXIII, Clean Water; Or, The Pure And Precious Blood Of Christ For The Cleansing of Polluted Sinners,” The Works of Ralph Erskine, vol. 4, p. 151