Shared ground
These two verses open with a short public-sounding shout—“Praise Yah!”—and then immediately turn inward: “Praise Yahweh, my soul.” The text presents praise as both communal language and personal self-address. Explicitly, the speaker calls for praise, then speaks to his own inner self as if it needs to be rallied.
The second verse makes a clear personal pledge. The psalmist intends to praise Yahweh for the whole span of his life, and he restates that same idea in parallel lines (“while I live” / “as long as I exist”). Praise is also expressed as singing, not only as an attitude.
Where interpretation differs
Two questions create most of the differences.
First, “Praise Yah!” can be heard as directed to others (“all of you”) or as a set refrain that also frames the speaker’s own worship. Either way, the next line makes the personal focus explicit (“my soul”).
Second, “my soul” can mean the inner life (thoughts, desires, emotions) or the whole self understood from the inside (“me, in my deepest self”). The passage does not spell out the boundaries of “soul,” but it clearly functions as the part of the person that can be addressed and stirred.
Why the disagreement exists
The Hebrew worship vocabulary is compact. A brief cry like “Praise Yah!” can function both as a call to a gathered group and as a repeated worship phrase. Likewise, “soul” language in the Psalms often overlaps with “self” language, so readers differ on how psychological or how holistic to make it.
What this passage clearly contributes
These verses contribute a basic theological posture: Yahweh is the fitting object of ongoing praise, and a worshiper may speak to his own inner self in order to align his whole person with that praise. The text also links praise with life itself—praise is not presented as occasional but as something intended to cover the full duration of a person’s existence (explicit claim), with “singing praises” naming one concrete form that praise can take (explicit claim).