物理学和数学之间的界限并不像我们想象的那么清晰。

The truth is rarely pure and never simple.

"The only thing that is truly infinite is the human imagination."

Passion is the fuel that drives creativity and keeps the fire burning.

知足是天然的财富，奢侈是人为的贫困。

The universe is not only stranger than we imagine, it is stranger than we can imagine.

"I think children are naturally curious and open to new ideas, and that's something I try to capture in my books."