假如你戴眼镜,而镜片脏了,在朗日下一定很容易觉察,因为明亮的光线,使镜片上的脏斑,成为在眼前遮荫的灰影。但是相反的;如果你处在黑暗的环境,因为四周一片晦暗,反倒难以发现镜片的污痕。 问题是:在明亮的情况下,就算眼镜不干净,也没有大碍;反而在黑暗中,需要光洁的镜片,帮助我们原本不清的视线。 同样的道理,愈是在圣明的朝代,邪佞的小人愈无所遁形;愈是板荡黯澹的时际,愈难以辨别忠奸;不是人们不愿,也非因眼睛不好,而是环境不行。 If you wear glasses, and the lens is dirty, under the Long Day must have been very easy to detect, because the bright light, so that the lens of the dirty spots, become shade in front of the gray shadow. But the opposite; if you are in a dark environment, because the surrounding dull, but difficult to find the stain on the lens. The problem is that under bright conditions, even if the glasses are not clean, there is no serious problem. Instead, in the darkness, there is a need for a clean lens that helps us to look beyond our eyes. The same token, the more the saints’ dynasties, the more evil the evil villain disappeared; the more slack and gloomy the occasion, the more difficult to discern the loyalty; not people do not want, nor because the eyes are not good, But the environment does not work.