"The truth is not always beautiful, but it is always necessary."

The things that we love tell us what we are.

The greatest use of life is to spend it for something that will outlast it.

解释：将自己的利益给了别人，别人也将会把实惠返回给自己；将自己的怨恨发泄给别人，祸害也将会降临到自己身上。

The future of computer science will be shaped by those who can seamlessly blend mathematical theory with computational practice.

"To live is to be followed by shadows."

In the quest to understand quantum gravity, we are like children playing on the shore of a vast ocean, occasionally finding a smooth pebble or a pretty shell, while the great ocean of truth lies undiscovered before us.