“And whereas you have attempted to build up the ruins of old Adam, and that upon yourself, and so, like a foolish builder, to build a tottering house upon the sands—you must throw down and utterly demolish all that building, and not leave a stone upon a stone, before you can begin to build anew. And whereas you have conceived that there is some sufficiency in yourself, to help justify and save yourself, you must conclude, that in that case there is not only in you an insufficiency, but also a non-sufficiency*:yea and that sufficiency that seemed to be in you, to be your loss.
In plain terms, you must deny yourself, as our Saviour says (Matt:16:24), that is, ‘you must utterly renounce all that ever you are, and all that ever you have done’; all your knowledge and gifts; all your hearing , reading, praying, fasting, weeping, and mourning; all your wandering in the way of works, and strict walking, must fall to the ground in a moment: briefly, whatsoever you have counted gain to you in the case of justification, you must now, with the apostle Paul, ‘count loss for Christ’(Phil. 3:7-9), and judge it to be ‘dung, that you may win Christ, and be found in him, not having your own righteousness, which is of the law, but that which is through the faith of Christ, the righteousness which is of God by faith.’”
*That is, you are not only unable to do enough, but also, you are not able to do anything. ‘Not that we are sufficient of ourselves to think anything as of ourselves’ (2 Cor. 3:5)
The Marrow of Modern Divinity