The only information we can legitimately derive from aesthetic and moral experiences is information about our own mental and physical make-up.
Inflation is the mechanism that can make the universe flat, homogeneous, and isotropic.
To write history is to wrestle with ghosts.
过去是一个异国他乡；他们在那里做事的方式不同。
The beauty of physics lies not just in the answers it provides, but in the mysteries it reveals.