"I have come to believe that a great teacher is a great artist and that there are as few as there are any other great artists. Teaching might even be the greatest of the arts since the medium is the human mind and spirit."

优秀和卓越之间的区别在于额外的努力。

"The true value of science lies in its ability to change our perspective."

每一次挫折都是为了卷土重来。