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.

The founders of a new colony, whatever Utopia of human virtue and happiness they might originally project, have invariably recognized it among their earliest practical necessities to allot a portion of the virgin soil as a cemetery, and another portion as the site of a prison.

数学之美在于它的简洁与深度。

科学不是关于控制。它是关于在面对永远比我们最新理论更丰富、更深邃的事物时，培养一种永恒的惊奇状态。

Innovation is not just about technology; it's about changing the way people think and act.