If you haven't read "As a Man Thinketh..." by James Allen, you are probably missing one of the greatest small books of the early 20th century. It is incredibly motivating, and even though it was written over 100 years ago, it is still just as relevant today. Dr. Rubin explains the power of this short book in a passionate talk to students who are about to graduate. The book is available for free here: https://asamanthinketh.net/