“Take delight in the LORD, and He will give you your heart’s desires.” (Psalms 37:4 HCSB)

New International Dictionary of Old Testament Theology and Exegesis:

“The poetic texts (Job 22:26; 27:10; Ps 37:4) share in common the reciprocity idea of the Wisdom tradition, especially in Ps 37:4. A close interplay exists between “delight . . . in the LORD,” and “desires of your heart.” The path to true self-fulfillment does not lie in a preoccupation with self but in selfless preoccupation with God.”

Just so.