If everything was perfect, you would never learn and you would never grow.

数学是关于概念之间关系的科学，与这些概念的内容无关。

Hatred and love are both perceptions.

我们征服的不是山，而是我们自己。

可持续性已不再是一种选择，而是我们对后代的责任。

Nothing spoils a romance so much as sense of humour in the woman—or the want of it in the man.

I must confess that I never could see any beauty in her. Her face is too thin; her complexion has no brilliancy; and her features are not at all handsome. Her nose wants character; there is nothing marked in its lines. Her teeth are tolerable, but not out of the common way; and as for her eyes, which have sometimes been called so fine, I could never see anything extraordinary in them.

"The future is not something we enter. The future is something we create."