Politics is not theory, but practice.

The advancement of mathematics is due to those who are driven not by the desire for application but by the joy of discovery.

科学的精神在于不断质疑和探索，它让我们永远保持对世界的好奇心。

To be a writer is to be a professional observer.

It's on the strength of observation and reflection that one finds a way. So we must dig and delve unceasingly.

"Never stop learning. The world is always changing, and you must change with it."

I can't go on, I'll go on.

The most successful societies are those that allow for the greatest degree of individual freedom and creativity.