出自先秦《荀子·非十二子》。尊重贤能的人，是“仁”的表现，鄙视道德不好的人，也是“仁”的表现。说明“仁”正反两个方面的标准。
化学是逻辑的诗，也是诗的逻辑。
The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.
I would like to paint the way a bird sings.