The great question which, in all ages, has disturbed mankind, and brought on them the greatest part of their mischiefs, has been, not whether there be power in the world, nor whence it came, but who should have it.

在数学中，提出问题的艺术必须比解决问题更有价值。

The architect must be a visionary.

有时候你最害怕的事情就是能让你自由的事情。

无人机最激动人心的应用还没有被发明出来。