Psalms 145:1

1.I will extol thee, my God and my king. David does not so much tell what he would do himself, as stir up and urge all others to this religious service of offering to God the praises due to his name. The design with which he declares God to be beneficent to the children of men is, to induce them to cultivate a pious gratitude, he insists upon the necessity of persevering in the exercise; for since God is constant in extending mercies, it would be highly improper in us to faint in his praises. As he thus gives his people new ground for praising him, so he stimulates them to gratitude, and to exercise it throughout the whole course of their life. In using the term daily, he denotes perseverance in the exercise. Afterwards he adds, that should he live through a succession of ages he would never cease to act in this manner. The repetitions used tend very considerably to give emphasis to his language. As it is probable that the Psalm was written at a time when the kingdom of David was in a flourishing condition, the circumstances deserves notice, that in calling God his king he gives both himself and other earthly princes their proper place, and does not allow any earthly distinctions to interfere with the glory due to God.

This is made still more manifest in the verse which follows, where, in speaking of the greatness of God as unmeasurable, he intimates that we only praise God aright when we are filled and overwhelmed with an ecstatic admiration of the immensity of his power. This admiration will form the fountain from which our just praises of him will proceed, according the measure of our capacity.