Robert Louis Stevenson said this quote

“ A writer can live by his writing. If not so luxuriously as by other trades, then less luxuriously. The nature of the work he does all day will more affect his happiness than the quality of his dinner at night. Whatever be your calling, and however much it brings you in the year, you could still, you know, get more by cheating. We all suffer ourselves to be too much concerned about a little poverty; but such considerations should not move us in the choice of that which is to be the business and justification of so great a portion of our lives; and like the missionary, the patriot, or the philosopher, we should all choose that poor and brave career in which we can do the most and best for mankind. ”