解释:君子有三件值得可惜的事:一辈子不学习,是第一件可惜的事;一天无所事事,是第二件可惜的事;一个人的名声败坏,是第三件可惜的事。
In the old world, you devoted 30% of your time to building a great service and 70% of your time to shouting about it. In the new world, that inverts.
In mathematics, you don't understand things. You just get used to them.