Passage
A Secret Treasure of David. Preserve me, O God, for I did trust in Thee.
A Secret Treasure of David. Preserve me, O God, for I did trust in Thee.
Psalms 16:1 A Secret Treasure of David. Preserve me, O God, for I did trust in Thee.
Psalms 16:2 Thou hast said to Jehovah, `My Lord Thou <FI>art<Fi> ;' My good <FI>is<Fi> not for thine own sake;
Psalms 16:3 For the holy ones who <FI>are<Fi> in the land, And the honourable, all my delight <FI>is<Fi> in them.
The verse centers on "secret", "treasure", "david", "preserve", "trust", and "thee". It is saying that the verse draws attention to "secret" and "treasure", so its meaning should be read from those terms before moving to application.
The next verse adds "Thou hast said to Jehovah My Lord...", so "secret" and "treasure" 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 "secret" and "treasure" with trust shaped by these words, not by a vague optimism outside the passage.