If something is good just because it is pleasurable, what does it matter whether you have sort of an abstract idea of whether it is good by someone else's sense or not?

既然令人喜爱的事物就是好的，那么何必在乎,别人对它的感受如何，这般抽象的观念呢？

耶鲁公开课 - 公正课程节选

Well, for a thing called main which itself is a function but a function I wrote, a tool I am writing at the moment not like printf which someone else wrote long ago, I have to say where does main start, where does main end, and I do that by using these curly braces.

至于这个名曰main的函数,由我们自己写的函数，也是一个工具,只不过由我们自己编写，而不是像printf那样已经由前人写好了,我们必须要说明main在哪开始，在哪结束，这样我们就要用到大括号了。

哈佛公开课 - 计算机科学课程节选