相对论是一种原理性理论，而非构造性理论。
The sensible world is an image of the intellectual.
The most important thing in directing is to have a clear vision of what you want to achieve.
The measure of our success is not just in tons extracted, but in communities uplifted.
The study of black holes has led us to the edge of our understanding, where the known laws of physics break down and new theories must emerge.
The universe is not only stranger than we imagine, it is stranger than we can imagine.