Prov 20:9.   Who can say, I have made my heart clean, I am pure from my sin? Eccl 7:20.   For there is not a just man upon earth, that doeth good, and sinneth not. Rom 7:14,17-18,21-23.   For we know that the law is spiritual: but I am carnal, sold under sin. ...Now then it is no more I that do it, but sin that dwelleth in me. For I know that in me (that is, in my flesh,) dwelleth no good thing: for to will is present with me; but how to perform that which is good I find not. ...I find then a law, that, when I would do good, evil is present with me. For I delight in the law of God after the inward man: But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members. 1 John 1:8,10.   If we say that we have no sin, we deceive ourselves, and the truth is not in us. ...If we say that we have not sinned, we make him a liar, and his word is not in us.