Thou, art Lord alone. Compare Psalm 86:10 and Isaiah 37:16. In the latter passage the phraseology is almost identical.
The heaven of heavens. Compare Deuteronomy 10:14; 1 Kings 8:27; Psalm 148:4. The expression has been explained as a term either for the highest heaven (see 2 Corinthians 12:2) or for the universe as a whole. The latter interpretation seems to suit best the various passages where this phrase occurs.
All their host. Some have taken this to mean the stars, but the last clause of the verse seems to point to the angels as the host of heaven.
Thou preservest them all. The preservation of all created things by the Creator of the universe was certainly believed by all sacred writers, but never so clearly stated as here. The psalmist says, “Thou preservest man and beast” (Psalm 36:6), but this acknowledgment falls far short of the universal scope of the present passage. The power to preserve is no less important than the power to create.