饥饿了就想吃饭，寒冷了就想温暖，疲劳了就想休息，爱好利益而厌恶祸害，这是人生下来就具有的本性。

Resilience is what keeps us moving forward in the face of challenges.

Reinforcement is the central factor in the acquisition of new behavior patterns.

I can never be safe; I always try and go against the grain. As soon as I accomplish one thing, I just set a higher goal. That's how I've gotten to where I am.

The deterioration of every government begins with the decay of the principles on which it was founded.