The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

心神应该保持平静稳定，骨力应该保持活动锻炼，胸怀应该保持宽广豁达，筋骨应该保持坚强硬朗，脊梁应该保持端正平直，肠胃应该保持素淡洁净，舌端应该保持谨慎寡言，脚跟应该保持坚定不移，耳目应该保持聪明朗洁，精神应该保持正直无邪。

Sustainability isn't a trend—it's a responsibility we owe to future generations.

To touch is to remember.

我相信掌握他人已经发现的最佳知识的纪律。