Black is a color of light, not of darkness.
黑色是光的颜色，不是黑暗的颜色。
恐惧常常是我们最大不幸的根源。
The more you experience, the more you learn.
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.
The best ideas often come from those who work closest to the problem.
The best way to make people happy is to make them laugh.