One has to reach to the absolute state of awareness: that is Zen. You cannot do it every morning for a few minutes or for half an hour and then forget all about it. It has to become like your heartbeat. You have to sit in it, you have to walk in it. Yes, you have even to sleep in it.
OSHO, Walking in Zen, Sitting in Zen
Zen lives in the present. The Whole teaching is: how to be in the present; how to get out of the past which is no more and how not to get involved in the future which is not yet, and just to be rooted, centered, in that which is.
OSHO, Zen: The Path of Paradox