the following is taken from Bhagwan Shree Rajneesh's Book of the Secrets Vol.2(pgs 158-160):
Alexander was coming to India, and he met a great saint - Diogenes. Diogenes was one of the most penetrating minds ever born. He lived like Mahavir. He is the Mahavir of Greek civilization and culture. He left everything, renounced everything - not because through renouncing things he was going to get anything: that is not real renouncing, not authentic renunciation. If you renounce something to get something, that is a bargain. If you think that you are going to have some reservation in heaven and that is why you renounce, it is not renunciation. If you renounce the bodily pleasures to have spiritual pleasures, this is not renunciation.
Diogenes renounced everything - not because out of it he was going to get something: he renounced just to see if when he has nothing, whether there is any meaning or not. He thought that if one possesses nothing, if even then one has meaning, a purpose, a destiny, then death cannot annihilate anything because death can annihilate only possessions - and the body is also a possession. He left everything. He had only one thing: a wooden bowl out of which to drink water. He thought this is not much of a possession. Then one day he saw a child drinking water from his hands. He immediately threw the bowl. He said," If a child can drink water with his hands, am I more weak than a child?"
When Alexander was coming to India to win, to make the world empire, somebody informed him that just on the way, where he would be stopping, there lived a great sage who was just contrary to him. He was told, "You are to make a world empire, and he has even thrown away his bowl because he says that as he is happy without it, why carry this burden. And you say that unless the whole world becomes your empire, you cannot be happy. So he is just at the opposite pole, and it would be good if you meet him."
Alexander was fascinated. It happens that the opposite always fascinates. The opposite always fascinates; it has a deep sexual attraction. Just as man is attracted to woman or woman is attracted to man, there is the same attraction with the opposite. Alexander could not by-pass Diogenes. It was not good for him to go to Diogenes, and it was impossible that Diogenes would come to him. There was no end.
Diogenes was informed. Many. many messengers came to inform him that "The Great Alexander is passing this way. It would be good if you meet him." He said," The Great Alexander? Who has said this to you! I think he himself. So tell your Great Alexander that he has nothing to give to me, and there is no need for him to meet me - and I am a very small man." He used to say, " Really, I am a dog, not a man at all - just a dog, so there is no need. It is below his dignity to meet this dog."
Then Alexander had to come. Diogenes is reported to have said, "I hear you are going to win the whole world, so I thought, I closed my eyes & thought, Okay! If I have won the whole world, then what?" It is reported that Alexander, after hearing this, became very sad. "Then what?" he said to Diogenes. "Do not talk such things. You make me very sad."
Diogenes said,"But you will become very sad when you win the whole world. What can I do? I am just imagining, and I have come to conclude that this is useless. You are after a suicidal effort. You yourself are trying to win the whole world, so then what? If you succeed, 'then what?'"
Alexander returned from Diogenes very disturbed, upset,sad. He said to his companions, "This man is very dangerous. He has shattered my dreams." And he could never forgive Diogenes. The day he died, he remembered him again, and he said, "It may be that fellow was right. 'Then what?'"