They know not, neither will they understand. Scarcely "an aside from the indignant judge," as Professor Cheyne suggests, much less a remark interpolated by the poet (Ewald, Hitzig). Rather a complaint of human perversity, addressed by Jehovah to the angelic host who are present (Psalms 82:1).
It is not an accidental and excusable ignorance, but a wilful and guilty one that is spoken of. They walk on in darkness. Loving darkness rather than light, because their deeds were evil (John 3:19), they walked in the way of darkness (Proverbs 2:13).
All the foundations of the earth are out of course; rather, are shaken. The fundamental bases on which the life of man upon the earth rests, the very principles of morality, are shaken, and totter to their fail, when those whose place it is to administer justice pervert it and deal out injustice instead.