理论不应该试图解释所有事实，因为有些事实是错误的。
A theory should not attempt to explain all the facts, because some of the facts are wrong.
生活的艺术在于知道何时坚持，何时放手。
Character is the sum of one's habits.
In things indifferent， nothing is preferable to anything else.
你必须先有爱，然后才能变得无情。
投资更清洁的煤炭技术就是投资我们的未来。