Passage
Let the words of my mouth and the meditation of my heart be acceptable in thy sight, O Jehovah, my rock, and my redeemer.
Let the words of my mouth and the meditation of my heart be acceptable in thy sight, O Jehovah, my rock, and my redeemer.
Psalms 19:12 Who understandeth [his] errors? Purify me from secret [faults].
Psalms 19:13 Keep back thy servant also from presumptuous [sins]; let them not have dominion over me: then shall I be perfect, and I shall be innocent from great transgression.
Psalms 19:14 Let the words of my mouth and the meditation of my heart be acceptable in thy sight, O Jehovah, my rock, and my redeemer.
The verse centers on "words", "mouth", "meditation", "heart", "acceptable", "sight", "jehovah", and "rock". It is saying that the verse draws attention to "words" and "mouth", so its meaning should be read from those terms before moving to application.
The prior verse says "Keep back thy servant also from presumptuous...", giving immediate footing for "words" and "mouth". 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 "words" and "mouth" with trust shaped by these words, not by a vague optimism outside the passage.