记忆是咬自己尾巴的狗。

I always try to stay focused on the present moment.

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

道理明白了，文辞就能表达清楚；文辞表达清楚了，道理也就明白了。

《在北京五族共和合进会与西北协进会的演说》，1912年9月3日。

过去是某种已经发生的未来。