仅仅知道如何使用工具是不够的;还必须了解它们何时适用。
I don’t make music for the critics. I make it for the people who need it.
真相很少纯粹,也绝不简单。
Inquiry into reality begins with the recognition of our ignorance.
Make no mistake about it: Computers process numbers - not symbols. We measure our understanding (and control) by the extent to which we can arithmetize an activity.