Delight yourself in the Lord, and He will give you the desires of your heart
So does this mean that God is where our desires come from? Or does it mean that our desires willbe filled by God?
I think it's both. I think the closer we move to the heart of God, the more our pulse becomes in sync with His, and through time our desires are moulded to reflect His. At the same time, the story of God and man is a love story, with God consistantly wanting to bring us joy and peace and love and delight. All good and perfect gifts come from Him, and He alone fulfills our desires.
WIth God there is so much good, even in the midst of trials and heartache, he is there to be our delight.