Who can say, “I have made my heart pure; I am clean from my sin”?
This question is not only a challenge to any man in the world to prove himself sinless, whatever he pretends, but a lamentation of the corruption of mankind, even that which remains in the best. Alas! Who can say, "I am sinless?" Observe, 1. Who the persons are that are excluded from these pretensions - all, one as well as another.
Who can say, I have made my heart clean,.... The heart of than is naturally unclean, the mind, conscience, understanding, will, and affections; there is no part clean, all are defiled with sin; and though there is such a thing as a pure or clean heart, yet not as made so by men; it is God that has made the heart, that can only make...
The interrogation in the affirmative strengthens the implied negation (compare Job 15:14; Ecc 7:20).