用爱和智慧去指导你的生活。
凡是圣人制造的这些东西,无一不是有益于实用才去做的,所以使用财物不浪费,民众能够不劳苦,他兴起的利益太多了。
The power of abstraction is that it allows us to ignore irrelevant details and focus on the essential aspects of a problem.
The past is always tense, the future perfect.