可信因果推断的关键不仅是方法，还有方法与当前问题的契合度。
The key to credible causal inference is not just the method, but how well the method fits the question at hand.
The self grows through dialogue with others and with the world.
The light of truth will eventually pierce the darkness.
信仰是所望之事的实底，是未见之事的确据。
Memory is a kind of accomplishment, a sort of renewal even.
There is no absolute security, only relative risk control.
