"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

There are still many causes worth sacrificing for, so much history yet to be made.

你唯一应该回头看的时候是看你已经走了多远。

城市的穷人就像树的根：看不见，但对生存至关重要。

统一自然界所有力的挑战是几十年来推动理论物理学发展的动力之一。