The way positive reinforcement is carried out is more important than the amount.

In business, as in life, you have to be willing to adapt to survive.

乐观主义者认为这是所有可能世界中最好的一个。悲观主义者则担心这是真的。

Cultivate 12 people who love you， because they are worth more than 12 million people who like you.

When you hold a piece of aggregate, you're holding millions of years of earth's history.

There is a stubbornness about me that never can bear to be frightened at the will of others. My courage always rises at every attempt to intimidate me.