From Sexus (1949), by Henry Miller.

The reason why [the artist] has such a miserable time of it is because he elects to do his work gratuitously. He forgets, as you say, that he has to live. But that’s really a blessing. It’s much better to be preoccupied with wonderful ideas than with the next meal, or the rent, or a pair of new shoes. Of course when you get to the point where you must eat, and you haven’t anything to eat, then to eat becomes an obsession. But the difference between an artist and the ordinary individual is that when the artist does get a meal he immediately falls back into his own limitless world, and while he’s in that world he’s a king, whereas your ordinary duffer is just a filling station with nothing in between but dust and smoke. And even supposing you’re not an ordinary chap, but a wealthy individual, one who can indulge his tastes, his whims, his appetites: do you suppose for one minute that a millionaire enjoys food or wine or women like a hungry artist does?