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.

Don’t regret getting older. It’s a privilege denied to many.

创新不仅仅是技术的问题；它关乎改变人们的思维和行为方式。

过去永远在那里，但它不是唯一存在的东西。