伟大的领导者倾听多于发言。
Great leaders listen more than they speak.
All serious art attempts to make sense of the world.
真正的记忆艺术是注意力的艺术。
人的自由，以及按照自己的意愿行动的自由，是基于他拥有理性，这种理性能够教导他他应该遵循的法律，并使他知道他自己的意愿自由有多远。
Psychology should focus on how the mind helps us adapt to our environment.
The tears of the world are a constant quantity. For each one who begins to weep, somewhere else another stops. The same is true of the laugh.