数学不是一项观赏性运动；要理解它，必须积极参与其中。
测量可测量的，并使不可测量的成为可测量的。
We may have all come on different ships， but we're in the same boat now.
In mathematics, truth is always relative to the system you're working in.
"A novel is a long piece of prose with something wrong with it."