山中有长得直的树，世上却没有直的人。

世界越是混乱，我们越需要建筑来理解它。

"A book is a fragile creature, it suffers the wear of time, it fears rodents, the elements and clumsy hands. So the librarian protects the books not only against mankind but also against nature and devotes his life to this war with the forces of oblivion."

Psychology is the science of mental life in its adaptive relations.

The line between good and evil is permeable and anyone can cross it when pushed by circumstances.

I can resist everything except temptation.

The ruling class has the means of material production at its disposal; the proletariat has nothing but their labor power.