Sustainability isn't a destination—it's a daily practice.

我不在乎别人怎么说我。我知道我是谁。

The process of discovery in mathematics is often more important than the result itself.

Beauty is truth, truth beauty,—that is all ye know on earth, and all ye need to know.

有人居住的世界的边界是由人类知识的极限决定的。