'Clean' in the Bible

The fear of the LORD is clean, enduring for ever: the judgments of the LORD are true and righteous altogether.

He that hath clean hands, and a pure heart; who hath not lifted up his soul unto vanity, nor sworn deceitfully.

Purge me with hyssop, and I shall be clean: wash me, and I shall be whiter than snow.

Create in me a clean heart, O God; and renew a right spirit within me.

{A Psalm of Asaph.} Truly God is good to Israel, even to such as are of a clean heart.

Is his mercy clean gone for ever? doth his promise fail for evermore?