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.
在金融领域，唯一确定的就是不确定性，而管理它的唯一方法是通过多样化和对冲。
The progress of mathematics is measured by the number of problems it can solve.