Quotation by Mark Twain

There are wise people who talk ever so knowingly and complacently about "the working classes," and satisfy themselves that a day's hard intellectual work is very much harder than a day's hard manual toil, and is righteously entitled to much bigger pay.... As far as I'm concerned, there isn't money enough in the universe to hire me to swing a pickaxe thirty days, but I will do the hardest kind of intellectual work for just as near nothing as you can cipher it down—and I will be satisfied, too.... The law of work does seem utterly unfair—but there it is, and nothing can change it: the higher the pay in enjoyment the worker gets out of it, the higher shall be his pay in cash, too.