The only person you should try to be better than is the person you were yesterday.
For as long as I can remember, Mom has been a middle-aged woman, but no one told me she used to be a young girl.
The greatest threat to our forests isn’t logging—it’s indifference.
【译文】下等君主用自己能力，中等君主用他人劳力，上等君主用他人智慧。
认为世界上只有一种真理，而自己正掌握着它，在我看来这是世界上所有邪恶的最深根源。
Every discovery in physics is a step closer to understanding the grand design of the universe.