经验的直接内容是唯一可以作为心理学研究主题的事实。
真相是一件美丽而可怕的事情,因此应该非常谨慎地对待。
幸福存在于内心。
To be a philosopher is not merely to have subtle thoughts, nor even to found a school, but so to love wisdom as to live according to its dictates.