…and the blood of Jesus Christ His Son cleanseth us from all sin. – 1 John 1:7

Blessed be the name of the Lord, unless we are awfully deceived, we do desire to do that which is well-pleasing in His sight.

When the grace of God opens a man’s eyes to see his best actions as they appear in God’s sight, he sees that those actions are marred by sin. There is not anything that he has done which appears to him to be what it ought to be when he looks at it aright in the light of God’s Word. The most consecrated action of his life, the most devout communion with Christ, the most intense ardor after God, falls far short of what it ought to be, and has something in it which ought not to be there. When the grace of God is strong within us, it makes sin appear to abound even to our own vision; we see it in every hymn we sing, in every prayer we pray, in every sermon we preach. Not only do we see sin in our best things, but we also discover sin in our omissions. We were never troubled about that matter before, but now we recollect that what we do not do is often sinful; not merely the wrong that we commit, but the good that we omit, the good that we neglect or forget to do. There is much sin there. Then we begin to examine our thoughts, and our trivial utterances, and we see them all crusted over with sin. Well, what then? Why, then, this blessed text comes sweetly home to our hearts. “The blood of Jesus Christ His Son cleanseth us from all sin.” And now, how gloriously grace abounds! Now we prove the power of that precious blood which can wash us whiter than snow, so that God Himself shall say to each one of us, “There is no spot in thee.”

Beloved brethren and sisters in Christ, I do firmly believe that a deep and clear sense of sin is necessary to a right estimation of the power of pardoning love. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3115.cfm