最大的满足是知道你已全力以赴。
The only constant in life is change.
The deterioration of every government begins with the decay of the principles on which it was founded.
我们对自然的自觉认识所能解决的最直接且在某种意义上最重要的问题,是对未来事件的预测,以便我们能根据这种预测安排当前的事务。