Passage
Let the sayings of my mouth, And the meditation of my heart, Be for a pleasing thing before Thee, O Jehovah, my rock, and my redeemer!
Let the sayings of my mouth, And the meditation of my heart, Be for a pleasing thing before Thee, O Jehovah, my rock, and my redeemer!
Psalms 19:12 Errors! who doth understand? From hidden ones declare me innocent,
Psalms 19:13 Also--from presumptuous ones keep back Thy servant, Let them not rule over me, Then am I perfect, And declared innocent of much transgression,
Psalms 19:14 Let the sayings of my mouth, And the meditation of my heart, Be for a pleasing thing before Thee, O Jehovah, my rock, and my redeemer!
The verse centers on "sayings", "mouth", "meditation", "heart", "pleasing", "before", "thee", and "jehovah". It is saying that the verse draws attention to "sayings" and "mouth", so its meaning should be read from those terms before moving to application.
The prior verse says "Also--from presumptuous ones keep back Thy servant...", giving immediate footing for "sayings" 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 "sayings" and "mouth" with trust shaped by these words, not by a vague optimism outside the passage.