数学证明的优雅在于其简洁和清晰。
The elegance of a mathematical proof is in its simplicity and clarity.
我对记忆了解得越多,就越不信任它。
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.