Old minds are like old horses; you must exercise them if you wish to keep them in working order.

有些天性太过顽固而无法抑制，太过傲慢而不能屈服。

"In every story, there is a hidden truth waiting to be discovered."

数学的乐趣在于努力理解的过程。

In the end, we are our choices. Build yourself a great story.

My favorite things in life don't cost any money. It's really clear that the most precious resource we all have is time.