Prayer begins in us the restoration of the divine image, in all its hiddenness and wonder. It brings us closer to the "region of likeness" and every prayer is an act of letting the old self go. It involves "dying". The grain of wheat falls into the ground and dies. Dead, it is destined to bear much fruit.
The true source of joy is love -- love of God, love of beauty, love of wisdom, love of another human being, it does not matter which. It is all one love: a joyful awareness of dissolving boundaries of our ordinary narrow self, of being one with the reality beyond, of being made whole.