Aristotle has defined man as a rational being. That is sheer nonsense! Man is the most irrational being you can find anywhere. Man can be rational, but is not. It is not the definition of man as he is, it is the definition of man as he should be. A Buddha, yes; a Mohammed, yes -- they are rational beings, rational in the sense that they live intelligently, they live wisely, they use each single opportunity to grow, to mature, to be.
But as far as millions of human beings are concerned, ninety-nine point nine percent of people, they are not rational beings at all, they are utterly irrational.
Their first irrationality is that they pass through the same experience again and again, yet they learn nothing, they remain the same. How many times have you been angry, and what have you learned out of it? How many times have you been jealous, and what experience have you gained out of it? You go on moving through experiences without in any way being affected by them. You remain un-grownup; your way of life is very irrational, unintelligent.
-Rajneesh