Thy testimonies are very sure,.... Meaning not the works of God, of nature, and providence, which testify of his power and Godhead, and other perfections of it; rather the word of God, the Scriptures of truth, the law and Gospel; the one being a testimony of his will to be done by men, the other a testimony of his good will to men; which are sure and true, and to be believed; though it seems best of all to understand them of the promises of God, which testify what he will do, or shall be done hereafter, and which are all yea and amen in Christ; and especially those that respect his kingdom and interest, the glory, stability, and eternity of it, things which are the principal subjects of this psalm; all which promises are sure and certain, true and faithful, firm, and to be believed; see Gen 19:9, holiness becometh thine house, O Lord, for ever; or "unto length of days" (d): holiness is a dress or clothing; though it is not the robe of a justifying righteousness, yet it is an inner garment, which makes the saints all glorious within; it is a very beautiful and becoming dress; it is called "the beauty of holiness", and it is always becoming; it becomes the church and people of God, all that are of the household of God, both now and for evermore; it will never be out of use; it will be more and more in use, both in the spiritual reign of Christ, and in the New Jerusalem church state, and in heaven to all eternity; see Zac 14:20. (d) "in longitudinem dierum", Pagninus, Montanus, Junius & Tremellius, Piscator, &c. Next: Psalms Chapter 94