In a nutshell, learning how to make decisions in the best possible way and learning to have the courage to make them comes from a) going after what you want, b) failing and reflecting well through radical open-mindedness, and c) changing/evolving to become more capable and less fearful.
The Author of this Quote

Author
Ray Dalio
Founder of Bridgewater Associates, author of #1 New York Times bestseller 'Principles,' professional mistake maker