Bible Verses About The Fall of Man: Cannot be Remedied by Man

Who can say, I have made my heart clean, I am pure from my sin?

For though thou wash thee with nitre, and take thee much soap, yet thine iniquity is marked before me, saith the Lord GOD.

Can the Ethiopian change his skin, or the leopard his spots? then may ye also do good, that are accustomed to do evil.