oedipus the king

This question requires you to make a connection between the Sphinx riddle's answer - 'man' - and Oedipus' fate. Oedipus, as a consequence of seeking the answer to his kingdom's plague, manages to go through the three stages of the Sphinx's riddle. He is the baby with pierced ankles, crawling on four feet to escape a messenger who would kill him. Then he is the proud adult, king of Thebes, walking on two feet. And finally he is the old, blinded man, walking with a cane, cast out of his own kingdom.