Just as one sees his nose best in a mirror, removed to half the optimum focal distance, so also he best identifies his sense data by reflecting them in external objects.
英
美
- 正像人只有通过镜子(移至焦点距离的一半)才最能看清自己的鼻子一样,同样,他也只有借助对外部对象的观照才能最好地认清他的感觉材料。