I wonder about joy. That transcending, fleeting moment that grabs you and leaves you wanting more. Where does it come from and where does it go? Can we capture it and pull it out later when times seem joyless? I think not.
I call it Joy, which is here a technical term and must be sharply distinguished both from Happiness and Pleasure. Joy (in my sense) has indeed one characteristic, and one only, in common with them; the fact that anyone who has experienced it will want it again... I doubt whether anyone who has tasted it would ever, if both were in his power, exchange it for all the pleasures in the world. But then Joy is never in our power and Pleasure often is.”
-C.S. Lewis in "Surprised by Joy"