“¿Qué cosa es más dura que una piedra y más blanda que el agua? Y sin embargo, el agua orada la dura piedra.” (Ovidio)
“Empty your mind. Be formless, shapeless. Like water. You put water into a bottle and it becomes the bottle. You put in a teapot, it becomes the teapot. Water can flow, or it can crash. Be water, my friend!” (Bruce Lee explicando en una entrevista el principio taoísta Wu wei)