成功不在于金钱，而在于热爱。

Success is not final, failure is not fatal: it is the courage to continue that counts.

没有革命的理论，就不会有革命的运动。

诗歌能深刻表达人的情感。

The key to credible causal inference is not just the method, but how well the method fits the question at hand.

说真话的唯一方式就是怀着善意。只有充满爱意的人说的话才能被听见。