training mind and body

One piece of advice: train your body to its limits. As far as you can go without injury. Train like a strong young athlete. But train your mind and techniques like you are old, decrepit and sneaky.

– Rory Miller, http://www.ikigaiway.com/2013/interview-rory-miller-detentions-specialist-and-conflict-expert/

Thanks to Kristian Larsen for the link.