最具创新性的想法往往来自倾听那些最接近客户的人。
人类认知最好被理解为信息处理层次的层级结构。
"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."