The key to credible causal inference is not just the method, but how well the method fits the question at hand.
成为英雄的最大障碍是怀疑自己是否会证明自己是个傻瓜;真正的英雄主义是抵抗这种怀疑,而最深刻的智慧是知道何时应该抵抗,何时应该服从。
"The true measure of progress is not in the accumulation of knowledge, but in its application for the betterment of humanity."