This document summarizes Theodore Roosevelt's 1910 speech "The Man in the Arena" delivered at the Sorbonne in Paris. In the speech, Roosevelt argues that true success comes from actively engaging in the struggles of life rather than criticizing from the sidelines. He says the "credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood" as he strives for noble goals, despite inevitable errors. Roosevelt stresses the importance of strong character and virtue in citizens, and of work, courage and having children to the success of a nation.