Adam Clarke on Proverbs 28:13

He that covereth his sins - Here is a general direction relative to conversion.

1. If the sinner do not acknowledge his sins; if he cover and excuse them, and refuse to come to the light of God's word and Spirit, lest his deeds should be reproved, he shall find no salvation. God will never admit a sinful, unhumbled soul, into his kingdom.

2. But if he confess his sin, with a penitent and broken heart, and, by forsaking every evil way, give this proof that he feels his own sore, and the plague of his heart, then he shall have mercy. Here is a doctrine of vital importance to the salvation of the soul, which the weakest may understand.