I say luck is when an opportunity comes along and you're prepared for it.

The best preparation for tomorrow is doing your best today.

"Innovation is the central issue in economic prosperity."

No arts; no letters; no society; and which is worst of all, continual fear, and danger of violent death; and the life of man, solitary, poor, nasty, brutish, and short.

我不是那种会让我的承诺失效的人。

Chemistry is the science of matter, but I prefer to see it as the science of change.

The existence of the natural world is the same kind of fact as the existence of any proposition.

In our reasonings concerning matter of fact， there are all imaginable degrees of assurance， from the highest certainty to the lowest species of moral evidence.

It’s not the strongest of the species that survive, nor the most intelligent, but the one most responsive to change.