A man knows when he is growing old because he begins to look like his father.

The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.

忧患使人生存发展，安逸享乐使人萎靡死亡。

写作是探索未知的一种方式。

我跑步不是为了延长生命，而是为了给生命增添活力。