数学的进步归功于那些不是被应用的欲望驱动，而是被发现的喜悦驱动的人。
你不必成为最好的，你只需要尽力而为。
Your most unhappy customers are your greatest source of learning.
To speak ill of others is a dishonest way of praising ourselves.
Paper can be permanent if you respect its characteristics and design accordingly.