'Clean' in the Bible

If I wash myself with snow water, and make my hands never so clean;

For thou hast said, My doctrine is pure, and I am clean in thine eyes.

Who can bring a clean thing out of an unclean? not one.

What is man, that he should be clean? and he which is born of a woman, that he should be righteous?

Behold, he putteth no trust in his saints; yea, the heavens are not clean in his sight.

The righteous also shall hold on his way, and he that hath clean hands shall be stronger and stronger.

How then can man be justified with God? or how can he be clean that is born of a woman?

I am clean without transgression, I am innocent; neither is there iniquity in me.