A long time ago in Ancient Greece, a sphinx held the city of Thebes under siege. Only those who could solve her riddle, would set the city free.
What goes on four feet in the morning, two feet at noon, and three feet in the evening?
Thankfully, Oedipus was very smart and knew the answer.
A man is a baby in the morning of his life, and he crawls on four feet. A man is an adult in the noon – the middle part – of his life, and he walks on two feet. But when a man is old, in the evening of his life, he walks with a cane, on three feet.
The sphinx was furious but left Thebes. And Oedipus, the hero, was made King of Thebes.