Passage
Thou hast said to Jehovah, `My Lord Thou <FI>art<Fi> ;' My good <FI>is<Fi> not for thine own sake;
Thou hast said to Jehovah, `My Lord Thou <FI>art<Fi> ;' My good <FI>is<Fi> not for thine own sake;
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.
Psalms 16:4 Multiplied are their griefs, <FI>Who<Fi> have hastened backward; I pour not out their libations of blood, Nor do I take up their names on my lips.
The verse centers on "thou", "hast", "said", "jehovah", "lord", "good", and "thine". It is saying that the verse draws attention to "thou" and "hast", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 1's "A Secret Treasure of David Preserve me..." into verse 3's "For the holy ones who FI are...", so "thou" and "hast" 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 "thou" and "hast" with trust shaped by these words, not by a vague optimism outside the passage.