89. The man who speaketh in this Psalm, as if he were tired of human mutability, whence this life is full of temptations, among his tribulations, on account of which he had above said, "The wicked have persecuted me;" and, "They have almost made an end of me upon earth" (ver. 89); burning with longings for the heavenly Jerusalem; looked up to the realms above, and said, "O Lord, Thy word endureth for ever in heaven;" that is, among Thy Angels who serve everlastingly in Thine armies, without desertion.
In heaven. In the faithful angels, (St. Augustine) or Jesus Christ. (Bell anger.)
The promises seem not to have their effect here; but they will in heaven. (Berthier)
The word of God is as unchangeable as heaven. (Calmet)
The psalmist praises God's works, which observe the order established by him. (Worthington)
How then can we doubt but his law and promises shall be accomplished? (Haydock)