一本好书是一次伟大的冒险。

人心比山川更险恶，比了解天象更困难。

The principle goal of education is to create men who are capable of doing new things, not simply repeating what other generations have done.

无知者是不自由的，正因和他对立的是一个陌生的世界。

The only limit to our realization of tomorrow will be our doubts of today.

灵感是一位不愿拜访懒人的客人。