教育系统的墙必须倒塌。教育不应是特权，所以有钱人的孩子才能学习。

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.

Happiness is not something ready made. It comes from your own actions.

Chemistry is the poetry of logic and the logic of poetry.