..and to come unto the knowledge of the truth. – 1 Timothy 2:4

This knowledge when it comes really to save the soul is what we call experimental knowledge-knowledge acquired according to the exhortation of the psalmist, “Oh, taste and see that the Lord is good”-acquired by tasting. Now, at this present moment, I, speaking for myself, know that I am originally lost by nature. Do I believe it? Believe it? I am as sure of it as I am of my own existence. I know that I am lost by nature. It would not be possible for anybody to make me doubt that: I have felt it. How many weary days I spent under the pressure of that knowledge! Does a soldier know that there is such a thing as a cat when he has had a hundred lashes? It would take a deal of argument to make him believe there is not such a thing, or that backs do not smart when they feel the lash. Oh, how my soul smarted under the lash of conscience when I suffered under a sense of sin! Do I know that I could not save myself? Know it? Why, my poor, struggling heart labored this way and that, even as in the very fire with bitter disappointment, for I labored to climb to the stars on a treadwheel, and I was trying and trying and trying with all my might, but never rose an inch higher. I tried to fill a bottomless tub with leaking buckets, and worked on and toiled and slaved, but never accomplished even the beginning of my unhappy task. I know, for I have tried it, that salvation is not in man, or in all the feelings, and weepings, and prayings, and Bible readings, and church goings, and chapel goings which zeal could crowd together. Nothing whatsoever that man does can avail him towards his own salvation. This I know by sad trial of it, and failure in it…

“Man lost: Christ his Savior. Man nothing: God all in all. The heart depraved: the Spirit working the new life by faith.” The Lord grant that these truths may come home to your hearts with power.~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1516.cfm