最悦耳的声音，莫过于对自己的赞美。

Education is the art of making man ethical.

位置测量越精确，动量测量就越不精确，反之亦然。

The person who is slowest in making a promise is the most faithful in performance of it.

What we see changes what we know. What we know changes what we see.

译文：用人如同使用器具，应取其专长。主张根据才能特点任用，反对求全责备。