The Magic Of Thinking Big By David J. Schwartz

Published in 1959, The Magic of Thinking Big is a cornerstone of the personal development genre. Unlike The Alchemist, which is a fictional allegory, Schwartz's book is a practical, no-nonsense guide to achieving success in your career, personal life, and relationships by fundamentally changing your thought patterns. Its core premise is that the size of your success is determined by the size of your belief.