Bless the LORD, ye his angels, that excel in strength, that do his commandments, hearkening unto the voice of his word.
Ver. 20. Bless the Lord, ye his angels] In stirring up the angels to praise God, he awaketh himself; and for this purpose, Incipit a superioribus, et finit in infirmis, saith Kimchi here, he calleth in the help of all the creatures, from the highest to the lowest; and, after all, concludeth as he began, with a saying to himself.
That excel in strength] Heb. Giants for strength, such as can prevail, and do great exploits, yet is all their strength derivative, they have it from God (who is Hagibbor, the mighty one, Deu 10:17), and hence the angel Gabriel hath his name, God is my strength. Labour we to be like unto the angels, strengthened with all might, &c., Colossians 1:11, walking about the world as conquerors, able to do all things through Christ, who strengtheneth us, Philippians 4:13 .
That do his commandments] viz. Cheerfully, speedily, universally, humbly, constantly. Let us do accordingly, else we mock God when we pray, "Thy will be done in earth, as it is in heaven."