The function of a system of hypotheses is to warn us beforehand what will be our experience—to enable us to make accurate predictions.

Psychology should focus on how the mind helps us adapt to our environment.

当一扇幸福的门关起的时候，另一扇幸福的门会因此开启，但我们却经常看这扇关闭的大门太久，而忘了注意到那扇已经为我们而开启的幸福之门。