粮食是百姓生存的根本，没有粮食人就无法生存。三天不吃粮食，父子之间也难以互相照顾。

学习的意愿是一种内在动机，其来源和奖励都在于其自身的实践。

The deepest theorems in mathematics often have the simplest statements.

一瞬间，过去的一切都离你而去，剩下的只有回忆。

"Ein Buch zu schreiben ist wie eine Reise in ein unbekanntes Land."

生活就是在你忙于制定其他计划时发生的事情。

"A good story is like a mirror that reflects the hidden corners of our souls."

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.