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 only difference between a rat and a human is that a rat learns from experience.

每一幅充满感情的肖像画都是艺术家的自画像，而不是模特的。

利润生长在责任播种的地方。