燕子飞来时正值春社，梨花凋落后便是清明时节。

战胜竞争对手的唯一方法，就是停止试图战胜竞争对手。

The best way to predict the future is to create it.

变化是所有存在的基本过程。

The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all.

Liberty cannot be preserved without a general knowledge among the people.

京东要做百年企业。