Believe that life is worth living, and your belief will help create the fact.
True friends are not those who have endless topics to talk about, but those who can stay together without feeling awkward even if they don't speak.
发散级数是魔鬼的发明,基于它们的任何证明都是一种耻辱。
The future of life on Earth depends on our ability to take action. Many individuals are doing what they can, but real success can only come if there is a change in our societies and our economics and in our politics.