《淮南子·原道训》
人之所以眼能看远，耳听声音，形体能承受重力，关节能伸屈，并能辨察黑白美丑，智慧理性能辨别是非异同，为什么呢？
今人之所以眭然能视，替然能听，形体能抗，而百节可屈伸，察能分白黑、视丑美，而知能别同异、明是非者，何也？
Why can a person's eyes see far, ears hear sounds, body withstand gravity, joints bend and stretch, and distinguish between black and white, beauty and ugliness? Wisdom and reason can tell the difference between right and wrong, difference and similarity, why?