For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: not of works, lest any man should boast. – Ephesians 2:8,9

The natural heart rebels against the simplicity of the way of salvation. “What! am I to do nothing but simply accept the righteousness already finished? Am I to leave off doing, and merely to look unto Him who was nailed to the tree, and find all my salvation in Him? “Well, then,” saith the proud heart, “I cannot understand it.” I cannot understand it because I doth not love it. Now, soul, if this be thy difficulty, and I believe, in nine cases out of ten, a proud heart is at the root of all difficulty about the sinner’s coming to Christ-if this it is which turns you aside and makes you foolish, then go to God about it, and seek wisdom from Him. He will show you the folly of this pride of yours and teach you that simply to trust in Jesus is at once the safest and most suitable way of salvation. He will make you see that if the way of salvation had been by doing, the method would not have suited you, for what could you do? If it had been by feeling, it would not have suited you either, for what can your hard heart feel? How can you make yourself tender of heart? But, seeing that it is by faith, it is therefore by grace. O that you may be made wise enough to stoop and kiss the silver sceptre which is outstretched to you, to come and buy this wine and milk, without money and without price, and accept with your whole heart, with intense joy, this perfect righteousness, this finished salvation which Christ hath wrought out and brought in for every seeking soul. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0735.cfm