译文：势单力薄容易受到损害，人多势众则不容易被摧毁。

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

我不是环境的产物。我是我决定的产物。

The whole conviction of my life now rests upon the belief that loneliness, far from being a rare and curious phenomenon, peculiar to myself and to a few other solitary men, is the central and inevitable fact of human existence.

The study of mathematics is like air or water to the development of science.