【大意】说话一定要讲信用，约定了就一定要做到，这是天下的高尚行为。
Sometimes you have to be a little bit naughty.
Mathematics teaches us to think logically and creatively at the same time.
When someone says "I want a programming language in which I need only say what I wish done," give him a lollipop.
The best leaders are those who empower others to lead.