我开始相信，一位伟大的教师就是一位伟大的艺术家，而且这样的教师和其他伟大的艺术家一样稀少。教学甚至可能是最伟大的艺术，因为它的媒介是人类的思想和精神。
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.
"We are all in the gutter, but some of us are looking at the stars."
这类波可以像光波一样被反射、折射和偏振。
True leadership is not about being in charge. It is about taking care of those in your charge.