The moment!

"Because I don't live in either my past or my future. I'm interested only in the present. If you can concentrate always on the present, you'll be a happy man. You'll see that there is life in the desert, that there are stars in the heavens, and that tribesman fight because they are part of the human race. Life will be a party for you, a grand festival, because lifeis the moment we're living right now." - The Alchemist (Paulo Coelho)