The Strangest Secret

In 'The Strangest Secret', Earl Nightingale distills his lifetime of research on human motivation into a simple success formula.

The book, which originated as a motivational speech for his insurance agency's sales staff, became a highly successful recording that sold over one million copies and earned a Gold Record.

Nightingale's central message is that 'we become what we think about', and he provides a 30-day test to help readers apply this principle to achieve personal, professional, and financial success.

The book is endorsed by Nightingale-Conant and remains a powerful and influential message in the self-improvement field.