"There is more simplicity in the man who eats caviar on impulse than in the man who eats grape-nuts on principle."

One great complaint, I think, must stand against the modern upholders of the simple life--the simple life in all its varied forms...This complaint against them stands, that they would make us simple in the unimportant things, but complex in the important things. They would make us simple in the things that do not matter-- that is, in diet, in costume, in etiquette, in economic system. But they would make us complex in the things that do matter--in philosophy, in loyalty, in spiritual acceptance, and spiritual rejection. It does not so very much matter whether a man eats a grilled tomato or a plain tomato; it does very much matter whether he eats a plain tomato with a grilled mind. The only kind of simplicity worth preserving is the simplicity of the heart, the simplicity which accepts and enjoys. There may be a reasonable doubt as to what system preserves this; there can surely be no doubt that a system of simplicity destroys it. There is more simplicity in the man who eats caviar on impulse than in the man who eats grape-nuts on principle.

...The only simplicity that matters is the simplicity of the heart. If that be gone, it can be brought back by no turnips or cellular clothing; but only by tears and terror and the fires that are not quenched. If that remain, it matters very little if a few Early Victorian armchairs remain along with it. Let us put a complex entree into a simple old gentleman; let us not put a simple entree into a complex old gentleman. So long as human society will leave my spiritual inside alone, I will allow it, with a comparative submission, to work its wild will with my physical interior. I will submit to cigars. I will meekly embrace a bottle of Burgundy. I will humble myself to a hansom cab. If only by this means I may preserve to myself the virginity of the spirit, which enjoys with astonishment and fear. I do not say that these are the only methods of preserving it. I incline to the belief that there are others. But I will have nothing to do with simplicity which lacks the fear, the astonishment, and the joy alike. I will have nothing to do with the devilish vision of a child who is too simple to like toys.

The child is, indeed, in these, and many other matters, the best guide. And in nothing is the child so righteously childlike, in nothing does he exhibit more accurately the sounder order of simplicity, than in the fact that he sees everything with a simple pleasure, even the complex things. The false type of naturalness harps always on the distinction between the natural and the artificial. The higher kind of naturalness ignores that distinction. To the child the tree and the lamp-post are as natural and as artificial as each other; or rather, neither of them are natural but both supernatural. For both are splendid and unexplained. The flower with which God crowns the one, and the flame with which Sam the lamplighter crowns the other, are equally of the gold of fairy-tales. In the middle of the wildest fields the most rustic child is, ten to one, playing at steam-engines. And the only spiritual or philosophical objection to steam-engines is not that men pay for them or work at them, or make them very ugly, or even that men are killed by them; but merely that men do not play at them. The evil is that the childish poetry of clockwork does not remain. The wrong is not that engines are too much admired, but that they are not admired enough. The sin is not that engines are mechanical, but that men are mechanical.

-Heretics (1905)