Tim Ferriss Quotes
The best way to improve mental performance, is to improve physical performance
Citations
Ferriss, Timothy. The 4-Hour Body: An Uncommon Guide to Rapid Fat-Loss, Incredible Sex, and Becoming Superhuman. Crown Archetype, 2010.
Related Quotes
Mens sana in corpore sano.
Timothy Ferriss is an American entrepreneur, investor, author, and lifestyle guru.