听我说，朋友，希望是件危险的事。希望能叫人发疯。
Listen to me, my friend. Hope is a dangerous thing. Hope can make people crazy.
The only limit to our realization of tomorrow will be our doubts of today.
死亡之所以紧紧跟随生命，不是因为生物学的必然性，而是因为嫉妒。生命如此美丽，以至于死亡爱上了它，这是一种嫉妒的、占有欲强烈的爱，它会抓住它能抓住的一切。
With a library you are free, not confined by temporary political climates. It is the most democratic of institutions because no one - but no one at all - can tell you what to read and when and how.
The safest course is to do nothing against one's conscience.With this secret， we can enjoy life and have no fear from death.
The sole meaning of life is to serve humanity.