The challenge in computer science is not just to solve problems, but to understand why they are problems in the first place.
When I accept myself as I am, then I can change.
你唯一应该回头看的时候是看你已经走了多远。
正确陈述的反面是错误陈述。但一个深刻真理的反面很可能是另一个深刻真理。