Psalms 150:1 - Joseph Benson’s Commentary on the Old and New Testaments

Praise God in his sanctuary In his temple, where this work was to be performed constantly and solemnly. Let his priests and people that attend there, attend him with their praises. Where should he be praised, if not where he in a special manner both manifests his glory and communicates his grace? Or praise him for, or on account of, his sanctuary, and the great privileges that we enjoy by having it among us. Or, as בקדשׁו, may be rendered, for his holiness; that is, for the inexpressible purity and holiness of his nature. Praise him in, or for, the firmament, or expansion, as the word signifies, (see on Genesis 1:16,) of his power “Which power is peculiarly displayed in the formation of the firmament, or expansion of the material heavens, and their incessant operations, by means of” the luminaries placed in them, and “the light and the air of which they are composed, upon the earth, and all things therein. These are the appointed instruments of life and motion in the natural world, and they afford us some idea of that power of God unto salvation which is manifested in the church, by the effects produced on the souls of men, through the gracious influence of the light divine, and the Spirit of holiness, constituting the firmament of God's power in the new creation.” Horne.