To every action there is always opposed an equal reaction； or， the mutual actions of two bodies upon each other are always equal， and directed to contrary parts.

Every setback is a setup for a comeback.

虚假的幸福使人变得刻薄和傲慢，而这种幸福从不传播。真正的幸福使他们善良和明智，而这种幸福总是分享的。

统计学家的目标是从样本中推断出总体是什么。

我不做容易的事。我让事情发生。

我一生中最遗憾的是善良的失败。