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

"The only way to have a friend is to be one."

The key to performance is elegance, not battalions of special cases.

人的本性是天生的质朴，善良是王道教化的结果

"The task of the modern educator is not to cut down jungles, but to irrigate deserts."

Your most unhappy customers are your greatest source of learning.