If we take from the land, we must give back in equal measure.

The beauty of mathematics lies not only in its ability to describe the world but also in its power to reveal the hidden structures that govern it.

解释：骄纵、奢侈、荒淫、放荡，这是走上邪路的开始。

Old paint on canvas, as it ages, sometimes becomes transparent. When that happens it is possible, in some pictures, to see the original lines: a tree will show through a woman's dress, a child makes way for a dog, a large boat is no longer on an open sea. That is called pentimento because the painter 'repented,' changed his mind. Perhaps it would be as well to say that the old conception, replaced by a later choice, is a way of seeing and then seeing again.

"Language is the bridge between the inner world and the outer world."

History is, above all else, the creation and recording of that heritage; progress is its increasing abundance, preservation, transmission, and use.