I often think of this – perfection of skills, these accumulate over time…
All small types of skills, — balance, walking, breathing, so many…
Every single kind of skill — Including energy, patience,
These are well to practice.
Having been one, you become many; having been many, you become one; you appear and vanish; you go unhindered through a wall, through a rampart, through a mountain as though through space; you dive in and out of the earth as though it were water; you walk on water without sinking as though it were earth; seated cross-legged, you travel in space like a bird; with your hand you touch and stroke the moon and sun so powerful and mighty; you exercise mastery with the body as far as the brahma world.
Samyutta Nikaya 12.70