GOD and ART....definitely.
GOD is the most essential, because even if all else was taken away from me and I was left alone, in a jail cell, cold and hungry, I would always have hope. Hope that God is with me and has a purpose for me and that ultimately all that I'm going through will be for the best.
and with ART I've often found that when my art is going well, it doesn't matter if everything else in my life is falling apart, I'll still feel excited and euphoric, whereas when my art is going badly, even if everything else in my life is perfect, I'll still feel really frustrated and miserable and unsatisfied.