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.

The soul is placed in the body like a rough diamond, and must be polished, or the luster of it will never appear.

心理学应该是关于心理生活的科学，包括其现象及其条件。

The world is a book, and those who do not travel read only one page.

释义：独具慧眼的人看山崖，能发现未经琢磨的玉石；靠近河川，便能知道水里有珍珠。比喻人应善于观察和学习，方能洞察事物本质。