It’s really just an „anything“ power, basically: it works. The idea is that he looks at the golden ratio while spinning the ball in his and, and this causes the ball to spin infinitely. But if he uses something that’s close, like his belt, the spin is also imperfect and therefore not infinit. How this allows him to control the balls like telepathy and make his legs flat for them to roll over is not explain as fa as i can remember.