The anitya doctrine is, again, not quite the simple assertion that the world is impermanent, but rather that the more one grasps at the world, the more it changes.
When you really understand that you are what you see and know, you do not run around the countryside thinking, "I am all this!" There is simply all this.
Zen is a liberation from time. For if we open our eyes and see clearly, it becomes obvious that there is no other time than this instant, and that the past and the future are abstractions without any concrete reality.
However much I may be impressed by the difference between a star and the dark space around it, I must not forget that I can see the two only in relation to each other, and that this relation is inseparable.
The future is a concept, it doesn't exist. There is no such thing as tomorrow. There never will be, because time is always now. That's one of the things we discover when we stop talking to ourselves and stop thinking. We find there is only present, only an eternal now.
Life and Reality are not things you can have for yourself unless you accord them to all others. They do not belong to particular persons any more than the sun, moon and stars.
The meaning of life is just to be alive. It is so plain and so obvious and so simple. And yet, everybody rushes around in a great panic as if it were necessary to achieve something beyond themselves.
Everybody should do in their lifetime, sometime, two things. One is to consider death...to observe skulls and skeletons and to wonder what it will be like to go to sleep and never wake up-never. That is a most gloomy thing for contemplation; it's like manure. Just as manure fertilizes the plants and so on, so the contemplation of death and the acceptance of death is very highly generative of creating life. You'll get wonderful things out of that.
There is nothing wrong with meditating just to meditate, in the same way that you listen to music just for the music. If you go to concerts to "get culture" or to improve your mind, you will sit there as deaf as a doorpost.
You will never get to the irreducible definition of anything because you will never be able to explain why you want to explain, and so on. The system will gobble itself up.
We think that the world is limited and explained by its past. We tend to think that what happened in the past determines what is going to happen next, and we do not see that it is exactly the other way around! What is always the source of the world is the present; the past doesn't explain a thing. The past trails behind the present like the wake of a ship and eventually disappears.