Proverbs 16:2 - Joseph Benson’s Commentary on the Old and New Testaments

All the ways of man are clean in his own eyes Men can easily flatter and deceive themselves into a good opinion of themselves, and of their own actions, though they be sinful; but the Lord weigheth the spirits He as exactly knows, as men do the things which they weigh and examine, the hearts of men, from which both their actions and the quality of them, in a great measure, proceed. Their ends and intentions, their dispositions and affections, which are hid, not only from others, but oftentimes in a great degree from themselves, are fully manifest to him. Thus he here intimates the reason why men deceive themselves, in judging of their state and actions; they do not search their own hearts.