你必须活在当下。

In the realm of quantum gravity, the fabric of spacetime is woven from the threads of entanglement.

I'd get this good feeling about all the things that I could be. And then I never became any of them.

我们都受到过去幽灵的困扰，但由我们决定是让它们困扰我们还是引导我们。

——〈在香港大学的演说〉（又名〈革命思想之产生〉），1923年2月19日

Materials themselves are not important; what matters is how you use them.