"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."

The strength of a response tendency depends on the amount of reinforcement received.

当我接近一个孩子时，他激发了我两种情感：对他现在的温柔，以及对他可能成为的尊重。

真正的智慧在于了解自己的无知。