Tao Te Ching

“The learning of the gentleman enters through his ears, fastens to his heart, spreads through his four limbs, and manifests itself in his actions. ... The learning of the petty person enters through his ears and passes out his mouth. From mouth to ears is only four inches—how could it be enough to improve a whole body much larger than that?”

— Xun Kuang 荀況 310 – 235 BCE
(Xún Kuàng, Xúnzǐ)
Early Confucian philosopher of "basic badness"