The greatest curse in life is the possession of great talents without the will to use them.
Life is too short to be anything but happy.
The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'
Denying or deflecting a compliment is rude. Accept it with thanks, even if you believe it is not deserved.
主要的义务规则是那些要求或禁止某些行为的规则。