For as many as are of the works of the law are under the curse… – Galatians 3:10

All who sin against the law are cursed by the law; all who rebel against its commands are cursed-cursed instantly, cursed terribly. Perhaps some here will be inclined to say, “Of course the law of God will curse all those who are loose in their lives, or profane in their conversation. We can all of us imagine that the swearer is a cursed man, cursed by God. We can suppose that the wrath of God rests upon the head of the man who is filthy in his life, and whose conversation is not upright, or who is a degraded man, under the ban of society.” But ah! my friend, it is not quite so easy to get at the real truth, which is this, that the curse of God rests upon every one of us, as by nature we stand before Him. Thou mayest be the most moral in the world, but yet the curse of God is upon thee; thou mayest be lovely in thy life, modest in thy carriage, upright in thy behavior, almost Christlike in thy conduct, yet, if thou hast not been born again, and regenerated by sovereign grace, the curse of God still rests upon thine head. If thou hast but committed one sin in thy life, God’s justice is so inexorable, that it condemns a man for one solitary offense; and though thy life should henceforth be one continued career of holiness, if thou hast sinned but once, unless thou hast an interest in the blood of Christ, the thunders of Sinai are launched at thee, and the lightnings of terrible vengeance flash all around thee. Ah! my hearers, how humbling is this doctrine to our pride, that the curse of God is on every man of the seed of Adam; that every child born in this world is born under the curse, since it is born under the law; and that the moment I sin, though I transgress but once, I am from that moment condemned already; for “cursed is every one that continueth not in all things which are written in the book of the law to do them.”-cursed without a single hope of mercy, unless he find that mercy in the Substitute “who was made a curse for us.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3254.cfm