遇宠辱而不惊则肝自宁，或动或静只要慎重则心自静，饮食有所节制则脾自安，调节呼吸少言语则肺自保全，淡泊少欲则肾气自足。
最好的科学发现往往发生在不同学科的交叉点。
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 eagle never lost so much time as when he submitted to learn of the crow.