Pleasures， then， and the avoidance of pains， are the ends that the legislator has in view.

Every piece of fruit tells a story - from the soil it grew in to the hands that harvested it.

Never give up, never give in.

译文：善于创始的人不一定完成得很好，有个好开头的人不一定有好结果。

The only way to change behavior is through manipulation of reinforcement contingencies.