过去从未死去。它甚至还未过去。

Never a failure, always a lesson.

看遍了世间的人情冷暖，才认识到旷达洒脱的可贵；尝遍了世间的种种滋味，才知道清净淡泊的真切内涵。

"We are all apprentices in a craft where no one ever becomes a master."

A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing.

The AdS/CFT correspondence is a powerful tool for understanding quantum gravity.