There was a debater in ancient Greece who once stuttered. Later, he practiced speaking to the sea with a stone in his mouth every day, and finally got rid of his stuttering. Who is this man?

Demosthenes was born with a stutter, a weak voice and a bad habit of shrugging. In the eyes of ordinary people, he doesn't seem to have any talent as an orator, because in Athens at that time, an excellent orator must have a loud voice, clear pronunciation, beautiful posture and outstanding eloquence. In order to become an outstanding political speaker, Demosthenes made several times more efforts than ordinary people, and studied and trained extremely hard. His initial political speech was very unsuccessful. Because of his unclear pronunciation and weak argument, he was driven off the rostrum many times. To this end, he studied hard. It is said that he copied the history of the Peloponnesian war eight times; He humbly asked famous actors for pronunciation methods; In order to improve his pronunciation, he read aloud with pebbles in his mouth and spoke against the wind and waves; In order to get rid of shortness of breath, he kept chanting poems while climbing the mountain on the steep mountain road; He installed a big mirror at home and practiced speaking in front of it every morning. In order to get rid of the bad habit of talking and shrugging, he hung a sword or an iron power on his head; He shaved his head so that he could hide and practice his speech. ...