" The secret is to fill your mind with thoughts of faith, confidence, and security. This will force out or expel all thoughts of doubt, all lack of confidence. To one man who for a long time had been haunted by insecurities and fears I suggested that he read through the Bible underlining in red pencil every statement it contains relative to courage and confidence. He also committed them to memory, in effect cramming his mind full of the healthiest, happiest, most powerful thoughts in the world. "

― Norman Vincent Peale , The Power of Positive Thinking