Your past does not equal your future.

令人惊讶的是，如果一个人花了一小笔钱不理解它，那么他理解它是多么困难。

The teacher must believe in the potential of his students. He must see in each one of them a spark of the divine fire.

"The greatest stories are those that linger in the heart long after the last page is turned."

数学的真正乐趣在于发现的过程，而不仅仅是结果。