外交是一门艺术，要耐心、智慧和灵活性。

物理学不仅仅是解决问题，它是关于理解现实的本质。

丙型肝炎的挑战不仅在于找到病毒，还在于理解它是如何逃避免疫系统的。

求知若饥，虚心若愚。

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

The city is a collective memory, and architecture is the physical manifestation of that memory.