生活是世界上最罕见的事情。大多数人只是存在，仅此而已。
"To live is the rarest thing in the world. Most people exist, that is all."
Persistence is key in mathematical research; many great results come from long struggles.
"The power of science fiction is that it can make the impossible seem possible."
And when they leave,they take your life of details with them. You are expected to move on again, but you don't remember what it was that moved you, because no one's asked you in so long. Not even yourself.