Men talk bravely of believing, while whole and sound; but few know it. Christ is the mystery of the Scripture; grace the mystery of Christ. Believing is the most wonderful thing in the world. Put any thing of your own to it, and you spoil it. Christ will not so much as look at it for believing. When you believe and come to Christ, you must leave behind you your own righteousness, and bring nothing but your sin: (Oh, that is hard!) leave behind all your holiness, sanctification, duties, humblings, and so on; and bring nothing but your needs and miseries, or else Christ is not fit for you, nor you for Christ. Christ will be a pure Redeemer and Mediator, and you must be an undone sinner, or Christ and you will never agree. It is the hardest thing in the world to take Christ alone for righteousness: that is to acknowledge Him Christ. Join any thing to Him of your own, and [Christ shall profit you nothing (Galatians 5:2-4)] .
Thomas Wilcox (1621-1687)