Principles by Ray Dalio

The rise of Bridgewater from his apartment in Manhattan to a world power in the financial world is remarkable. What's even more remarkable is the way he did it, and what he attributes his success to.

"Whatever success I’ve had in life has had more to do with my knowing how to deal with my not knowing than anything I know. The most important thing I learned is an approach to life based on principles that helps me find out what’s true and what to do about it."