I saw the following passage and am wondering whether "it is with A as with B" is current English. What is it used for? And what does "it" refer to?
It is with learning as with wealth. A few cannot be immensely wealthy, but the many must be poor. One palace, and a thousand cabins—a few “nobles,” and a “numerous rabble,” constitute those societies where there are patented and privileged classes. So it is in learning sacred and common.