Elementary mathematics needs rational thinking, but in the advanced stage, such as Ai En Stein's state, mathematics needs spirituality, which is what we often call perceptual thinking. This is why people with developed left brains learn mathematics well when they study, but in life they find that they can't solve practical problems with mathematics and create new theories. Because advanced mathematical activities such as mathematical modeling and new derivation of unknown things all need to use the right brain, so.