Man is neither wholly good nor wholly evil, but a mixture of both.
Writing is groping in the dark, hoping to find a light.
The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'
A mind free from cares and fears is needed to experience true happiness.
It is no use doing what you like;you have got to like what you do.
透明建立信任，而信任是牢固伙伴关系的基础。