Yestereve I saw philosophers in the market-place carrying their heads in baskets, and crying aloud, "Wisdom! Wisdom for sale!"
Poor philosophers! They must needs sell their heads to feed their hearts. Said a philosopher to a street sweeper, "I pity you. Yours is a hard and dirty task."
And the street sweeper said, "Thank you, sir. But tell me what is your task?"
And the philosopher answered saying, "I study man's mind, his deeds and his desires."
Then the street sweeper went on with his sweeping and said with a smile, "I pity you too."