Sufi tradition tells the story of a philosopher who was crossing a river in a boat. During the crossing, he tried to display his wisdom to the boatman.
“Do you know what great contribution Schopenhauer left to humanity?”
“No,” replied the boatman. “But I know God, the river, and the simple wisdom of my people.”
“Well, just know that you have lost half of your life!”
In the middle of the river the boat hit a rock and sank. The boatman was swimming towards one of the banks when he saw the philosopher drowning.
“I don’t know how to swim!” he shouted in despair. “I told you that you had lost half your life by not knowing Schopenhauer, and now I am losing my whole life for not knowing something so simple!”