I'll just let this quote speak for itself:
"Yes, it is true that God gave us His Son, and so maybe we ought also to give gifts--but what, and to whom? It is also true that God gave us Himself, and the only sensible response to that is to give ourselves to Him. There is nothing else that He wants from us, or, if there is something, He can take it. Only I, my ego, my heart, is
truly mine to give or to withhold--and is therefore the appropriate gift to Him."
- Walt Whitman (1819-1892), Song of Myself, in Leaves of Grass