To understand the mind, we must first understand its evolutionary purpose.

诗人是一个能使不可能变为可能的人。

The ratio of positive to negative emotions that predicts flourishing is about 3 to 1. Above that ratio, people tend to flourish; below it, they tend to languish.

就像虎的外形好画，虎的骨骼难画一样，人的外表好认，人心却难了解。