"The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all."

My blindness has never been a limitation; it has taught me to see the world in a different way.

You've got to learn to leave the table when love's no longer being served.

善于教导的人必须遇到善于学习的人，才能使教育的效果更大。

上帝的大能在柔和的微风中，不在狂风暴雨中。

The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.