在建筑中，虚空和实体同样重要。
The void is as important as the mass in architecture.
Facing market changes, an enterprise must have the ability to respond quickly.
I want my books to be a mirror, not a window.
Time is not a thing, thus we can neither waste nor save it; it is always with us.
那时我老得多，现在我比那时年轻。