You can't control everything in life, but you can control how you react to it.
Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.
世界是你内心的投射。你抱怨生活不公，往往是因为内心失衡；你觉得世界美好，是因为你心中有光。改变心态，就能改变你看世界的角度。
The best stories are the ones that leave you with more questions than answers.
