From the Plato's Republic 518a

任何有常識的人都會記得霧翳的眼睛可以區分為兩類，由兩種原因造成；自光明進入黑暗，或是自黑暗進入光明，靈魂之眼亦是如此。而記得這些事情的人，在見到一個人眼神困惑而又微弱之時，並不會因此而取笑這個人。首先，他會觀察這個人的靈魂是否自光明走入黑暗，因不習慣黑暗而無法看見，或者，此人是自黑暗的走向光明，因太亮而目眩。因此，他會以所處的條件與生存環境判斷別人是否快樂；然後，以此同情別人。或者，如果他對於一個從黑暗進入光明的靈魂產生取笑之心，那他就有更多的理由去取笑自光明返回黑暗的人。

Any one who has common sense will remember that the bewilderments of the eye are of two kinds, and arise from two causes, either from coming out of the light or from going into the light, which is true of the mind's eye, quite as much as of the bodily eye; and he who remembers this when he sees any one whose vision is perplexed and weak, will not be too ready to laugh; he will first ask whether that soul of man has come out of the brighter life, and is unable to see because unaccustomed to the dark, or having turned from darkness to the day is dazzled by excess of light. And he will count the one happy in his condition and state of being, and he will pity the other; or, if he have a mind to laugh at the soul which comes from below into the light, there will be more reason in this than in the laugh which greets him who returns from above out of the light into the den.

To be continued...