The source is an excerpt from a book, "Secrets of the Millionaire Mind," which advocates for a mindset shift to achieve financial success. The author argues that a person's subconscious "financial blueprint," shaped by childhood influences, dictates their financial outcomes. The book then explores the various beliefs and habits associated with both poverty and wealth, and provides specific techniques for adopting a "millionaire mind" to break free from self-defeating patterns and achieve financial freedom. The author uses real-life anecdotes and a straightforward style to illustrate the principles, emphasizing the importance of taking action and practicing new behaviors to create lasting change.