Passage
Therefore I confess Thee among nations, O Jehovah, And to Thy name I sing praise,
Therefore I confess Thee among nations, O Jehovah, And to Thy name I sing praise,
Psalms 18:47 God--who is giving vengeance to me, And He subdueth peoples under me,
Psalms 18:48 My deliverer from mine enemies, Above my withstanders Thou raisest me, From a man of violence dost deliver me.
Psalms 18:49 Therefore I confess Thee among nations, O Jehovah, And to Thy name I sing praise,
Psalms 18:50 Magnifying the salvation of His king, And doing kindness to His anointed, To David, and to his seed--unto the age!
The verse centers on "therefore", "confess", "thee", "nations", "jehovah", "name", "sing", and "praise". It is saying that the verse draws attention to "therefore" and "confess", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 48's "My deliverer from mine enemies Above my..." into verse 50's "Magnifying the salvation of His king And...", so "therefore" and "confess" 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 "therefore" and "confess" with trust shaped by these words, not by a vague optimism outside the passage.