Passage
Bless Jehovah, all ye his hosts; ye ministers of his that do his will.
Bless Jehovah, all ye his hosts; ye ministers of his that do his will.
Psalms 103:19 Jehovah hath established his throne in the heavens, and his kingdom ruleth over all.
Psalms 103:20 Bless Jehovah, ye his angels, mighty in strength, that execute his word, hearkening unto the voice of his word.
Psalms 103:21 Bless Jehovah, all ye his hosts; ye ministers of his that do his will.
Psalms 103:22 Bless Jehovah, all his works, in all places of his dominion. Bless Jehovah, O my soul!
The verse centers on "bless", "jehovah", "hosts", and "ministers". It is saying that the verse draws attention to "bless" and "jehovah", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 20's "Bless Jehovah ye his angels mighty in..." into verse 22's "Bless Jehovah all his works in all...", so "bless" and "jehovah" belong inside that flow. In Psalms context, the local focus is worship, trust, the LORD's kingship, and covenant mercy.
A plain takeaway is to answer the verse's own emphasis on "bless" and "jehovah" with trust shaped by these words, not by a vague optimism outside the passage.