The idea that a bell rings to signal when investors should get into or out of the stock market is simply not credible.

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

The beauty of physics lies not in having all the answers, but in asking better questions.

最大的风险就是不冒任何风险。在一个快速变化的世界里，唯一注定失败的策略就是不冒险。

Technology leaders must understand both technology and human nature.

解释：大多数花类药材都有升散的作用，而旋覆花却有降气的作用，说明药材特性的多样性。