Michtam means “golden” and/or “hidden.” Some have explained Psalm 16 as a song that leads to the deeper things of God, hidden from the wise, but are revealed to simple by the Spirit. Our text then could also be called, “A Psalm with a hidden or golden secret.”
The Apostle Peter when quoting from it said, “David speaks concerning Him (Jesus)” (Acts 2:25), and Paul made reference to this Psalm in the book of Acts 13:35-38, expressly ascribing it to God’s authorship through David and affirming that it spoke of His (Jesus') Resurrection.
The hidden treasure in this Psalm then is Jesus, whom the Father gave as a sacrafice for all, giving a future hope to all who believe through His resurrection and ascension (v.10). The Psalm goes on to promise His eventual glorious return, providing to all who are found in Him fulness of joy, and pleasures in heaven forevermore (v.11). Why? Because we are His poem, His workmanship, His song, His treasure, His joy.
The Truth: “Let us lay aside every weight, and the sin which so easily ensnares us, and let us run with endurance the race that is set before us, looking unto Jesus, the author and finisher of our faith, who for the joy that was set before Him endured the cross, despising the shame, and has sat down at the right hand of the throne of God.” (Hebrews 12:1-2)