Psalms 145:10

The greatness and goodness of him who is optimus et maximus - the best and greatest of beings, were celebrated in the former part of the psalm; here, in these verses, we are taught to give him the glory of his kingdom, in the administration of which his greatness and goodness shine so clearly, so very brightly. Observe, as before, I. From whom the tribute of praise is expected (Psa 145:10): All God's works shall praise him. They all minister to us matter for praise, and so praise him according to their capacity; even those that refuse to give him honour he will get himself honour upon. But his saints do bless him, not only as they have peculiar blessings from him, which other creatures have not, but as they praise him actively, while his other works praise him only objectively. They bless him, for they collect the rent or tribute of praise from the inferior creatures, and pay it into the treasury above. All God's works do praise him, as the beautiful building praises the builder or the well-drawn picture praises the painter; but the saints bless him as the children of prudent tender parents rise up and call them blessed. Of all God's works, his saints, the workmanship of his grace, the first-fruits of his creatures, have most reason to bless him. II. For what this praise is to be given: They shall speak of thy kingdom.

— Matthew Henry's Concise Commentary (public domain)

bless--as in Psa 145:1, to praise with reverence, more than merely to praise.

— Jamieson-Fausset-Brown Commentary (public domain)