What are the motifs in Seize the Day by Saul Bellow?

Success and failure is a recurring idea in the story. Tommy Wilhelm has made a series of mistakes and bad decisions in his life, and "through such decisions somehow his life had taken form."' Motivated by feeling or emotion rather than by rational thought, Wilhelm decided to go to Hollywood to try to become a "screen artist," to leave the Rojax Corporation because his territory was being divided and he was not being promoted, and to give Tamkin the last of his money.