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The strength of a response tendency depends on the amount of reinforcement received.

I don’t fear losing. I fear not giving my best.

The worst crime is faking it.

Optimism is a strategy for making a better future. Because unless you believe that the future can be better, you are unlikely to step up and take responsibility for making it so.

The right of nature...is the liberty each man hath to use his own power as he will himself for the preservation of his own nature.

"I am not a person who can be easily categorized, and I think that is a good thing."

人生苦短，不能不冒險(xiǎn)。