To feed the world, we must first understand the soil beneath our feet.

What can be said at all can be said clearly; and whereof one cannot speak thereof one must be silent.

切勿认为任何事物是绝对确定的。

我不是那种会让对历史的热爱减少的人。

There are unknown forces in nature; when we give ourselves wholly to her, without reserve, she lends them to us; she shows us these forms, which our watching eyes do not see, which our intelligence does not understand or suspect.

The night is a great teacher, but the stars are its lessons.