John Calvin Commentary Psalms 93:5

"Thy testimonies are very sure: Holiness becometh thy house, O Jehovah, for evermore." — Psalms 93:5 (ASV)

Thy testimonies are singularly true. Until now, the Psalmist has insisted upon the excellence of God in the work of creation and the providential government of the world. Now he speaks of His distinguishing goodness to His chosen people, in making known to them the doctrine which brings salvation.

He begins by commending the absolute trustworthiness and truthfulness of the law of God. This being a treasure which was not extended to all nations indiscriminately, he adds immediately that the house of God would be adorned with a glory which should last forever. The Divine goodness is displayed in every part of the world, but the Psalmist justly considers it as, of all others, the most inestimable blessing, that God should have deposited in His Church the covenant of eternal life, and made His glory principally to shine out of it.

Some translate the Hebrew word נאוה, naävah, desirable, as if the Psalmist had said that the adorning of the temple was precious; but the grammatical construction will not admit of this. By length of days is meant perpetual succession, and to this we find Isaiah referring in striking terms, so that the Divine truth might be preserved in faithful custody through successive ages.

Behold, I have put my word in thy mouth, in the mouth of thy seed, and of thy seed’s seed, (Isaiah 59:21).