A generation, pure in their own eyes, But from their own filth not washed.

There is a generation who seem to themselves to be free from sin, but are not washed from their unclean ways.

There is a generation which seems pure to themselves, and yet they are not even washed from their filthiness.

The Pharisee temper (compare the marginal reference).

The second, Those who were self-righteous, supposing themselves pure, and were not so.

There is a generation that are pure in their own eyes,.... Not in the eyes of God, who sees the heart, and all the impurities of it, as well as of life and conversation; nor in the eyes of others, though such may appear outwardly righteous before men; but in their own eyes, in their own conceit and imagination, trusting in themselves that they are righteous: but such have not their eyes opened or enlightened to see the plague of their own hearts, the spirituality of the law of God, the perfection of righteousness that requires; nor the righteousness and holiness of God himself; nor the imperfection and insufficiency of their own; did they, they would not seem pure and righteous to themselves. No man is pure by nature, or through anything done by them; but by the grace of God, and through the blood and righteousness of Christ; and such are far from being pure in their own eyes, or as considered in themselves: but those who are pure neither by nature nor by grace, yet think they are so. There were some such in Agur's time, and such were the Scribes and Pharisees in Christ's time; there were a generation of them; and there are of the same sort in our days, as Papists, Perfectionists, and all self-justiciaries; see Luke 18:9;
and yet is not washed from their filthiness; their native, original, and universal pollution by sin they have from their birth, and which is increased by numerous actual transgressions; and from which none are or can be washed but those who are born of water and of the Spirit, or are washed with the washing of regeneration; and are washed from their sins in the blood of the Lamb, whose blood cleanses from all sin; and are arrayed with the fine linen, clean and white, the righteousness of the saints, which is the righteousness of Christ imputed to them: whatsoever is short of these leaves men unwashed from their filthiness, whatever opinion they may have of themselves; see Job 9:30, Jeremiah 2:22.

Not washed - Who imagine they are truly religious, when they live in a course of wickedness.