历史感不仅包含对过去之过去的感知，还包含对过去之现在的感知。
The historical sense involves a perception, not only of the pastness of the past, but of its presence.
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
你不能敲机会的门却不做好准备。