The Magic of Thinking Big by David J. Schwartz is a motivational self-help book that argues that positive thinking and a belief in yourself are the keys to achieving success in life.

Here are some of the book's core ideas:

• The Power of Positive Thinking: The book emphasizes the importance of replacing negative thoughts with positive affirmations. Schwartz believes that positive thinking leads to positive actions and ultimately, positive results.
• Self-Belief is Key: The book argues that a strong belief in yourself and your abilities is crucial for success. If you don't believe you can achieve something, you're unlikely to put in the effort required to make it happen.
• Thinking Big, Not Just Wishing: The book differentiates between "wishful thinking" and having a well-defined, ambitious goal. It promotes setting big goals and taking concrete steps to achieve them.
• Eliminating Obstacles: The book identifies and addresses common roadblocks to success, such as fear of failure, procrastination, and making excuses.
• The Importance of Action: While positive thinking is important, Schwartz emphasizes that successful thinking must be coupled with taking action. The book offers strategies for overcoming fear and taking decisive steps towards your goals.

Overall, The Magic of Thinking Big aims to empower readers to break free from self-imposed limitations and achieve their full potential by adopting a positive mindset and taking action towards ambitious goals.