It's hardly rocket-science, but you'd think it was, judging by the way it takes teams of expensive experts years and years to discover.
You experience life first-hand, and experience the consequences of that first-hand life, then you are going to be a lot smarter, faster, stronger, and more resilient than someone who lives in a bathtub reading books.
Go climb a fuckin' tree, and maybe fall out of it a few times.
Then, after healing yourself, over time, in a lot of pain, and without any medical help, enjoy your new-found uber-ness.
Climb that fuckin' tree again, only this time, do it right.