Verse 12. Now the writer's mind is turned away from his personal and relative troubles to the true source of all consolation, namely, the Lord himself, and his gracious purposes towards his own people.
But thou, O Lord, shalt endure for ever. I perish, but thou wilt not, my nation has become almost extinct, but thou art altogether unchanged. The original has the word "sit," -- "thou, Jehovah, to eternity shalt sit:" that is to say, thou reignest on, thy throne is still secure even when thy chosen city lies in ruins, and thy peculiar people are carried into captivity. The sovereignty of God in all things is an unfailing ground for consolation; he rules and reigns whatever happens, and therefore all is well.
Firm as his throne his promise stands,
And he can well secure,
What I have committed to his hands.
Till the decisive hour.
And thy remmeberance unto all generations. Men will forget me, but as for thee, O God, the constant tokens of thy presence will keep the race of man in mind of thee from age to age. What God is now he always will be, that which our forefathers told us of the Lord we find to be true at this present time, and what our experience enables us to record will be confirmed by our children and their children's children. All things else are vanishing like smoke, and withering like grass, but over all the one eternal, immutable light shines on, and will shine on when all these shadows have declined into nothingness.