Quality is remembered long after the price is forgotten.
Mathematics teaches us to think logically and creatively at the same time.
我活得越久就越发现我从不出错,而我谦卑地花费精力验证自己想法的所有痛苦只是浪费时间。
开玩笑是件严肃的事情。
It is dangerous to be right in matters where established men are wrong.