He that covereth his sins shall not prosper: but whoso confesseth and forsaketh them shall have mercy. – Proverbs 28:13
There are many ways in which men try to cover their sin. Some do so by denying that they have sinned, or, admitting the fact, they deny the guilt; or else, candidly acknowledging both the sin and the guilt, they excuse and exonerate themselves on the plea of certain circumstances which rendered it, according to their showing, almost inevitable that they should act as they have done. By pretext and presence, apology and self-vindication, they acquit themselves of all criminality, and put a fine gloss upon every foul delinquency. Excuse-making is the commonest trade under heaven…But, in truth, you are now committing a fresh sin; for you are abasing God, you are inculpating the Almighty. You are impugning the law to vindicate yourself for breaking it. There is no small degree of criminality about such an unrighteous defence. The law is holy, just, and good. You are throwing the onus of your sins upon God. You are trying to make out that, after all, you are not to blame, but the fault lies with Him who gave the commandment. Do you think that this will be tolerated?…What, I say, is this but a high impertinence, ay, veritable treason, against the Majesty of that thrice holy God, before whom even perfect angels veil their faces, while they cry, “Holy, holy, holy, Lord God of Hosts”? I pray thee resort not to such a covering as this, because, while it is utterly useless, it adds sin to sin, and exposes thee to fresh shame.
“Here’s pardon for transgressions past,
It matters not how black they’re cast
And O, my soul, with wonder view
For sins to come here’s pardon too.”
~ C.H. Spurgeon
https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3500.cfm