Physical training is where you go, and how that changes you. It is directly experiential, yet also relative to other life endeavors.It transcends the physical.
In the world, water flows cascade down steep inclines. The forces move according to structures and properties of water, gravity, air, angular rock, and so on. The rocks are changed, and the water does countless things on the way down. By much work, the water is purified. Then, one day it evaporates, leaves the Earth and joins the clouds. I believe we are like that.