Passage
A Psalme of David. My soule, prayse thou the Lord, and all that is within me, prayse his holy Name.
A Psalme of David. My soule, prayse thou the Lord, and all that is within me, prayse his holy Name.
Psalms 103:1 A Psalme of David. My soule, prayse thou the Lord, and all that is within me, prayse his holy Name.
Psalms 103:2 My soule, prayse thou the Lord, and forget not all his benefites.
Psalms 103:3 Which forgiueth all thine iniquitie, and healeth all thine infirmities.
The verse centers on "psalme", "david", "soule", "prayse", "thou", "lord", and "within". It is saying that the verse draws attention to "psalme" and "david", so its meaning should be read from those terms before moving to application.
The next verse adds "My soule prayse thou the Lord and...", so "psalme" and "david" should be read forward into that movement. 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 "psalme" and "david" with trust shaped by these words, not by a vague optimism outside the passage.