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Leadership is like pruning: sometimes you must cut back to allow stronger growth.

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.

Your work is going to fill a large part of your life, and the only way to be truly satisfied is to do what you believe is great work.

我們生來就帶著正義的觀念。

The best way to predict the future is to invent it.