"I said, early in this essay, that hand-work might always be known from machine-work; observing, however, at the same time, that it was possible for men to turn themselves into machines, and to reduce their labour to the machine level; but so long as men work as men, putting their heart into what they do, and doing their best, it matters not how bad workmen they may be, there will be that in the handling which is above all price: it will be plainly seen that some places have been delighted in more than others---that there have been a pause, and a care about them; and then there will come careless bits, and fast bits; and here the chisel will have struck hard, and there lightly, and anon timidly; and if the man's mind as well as his heart went with his work, all this will be in the right places, and each part will set off the other; and the effect of the whole, as compared with the same design cut by a machine or a lifeless hand, will be like that of poetry well read and deeply felt to that of the same verses jangled by rote. There are many to whom the difference is imperceptible; but to those who love poetry it is everything---that had rather not hear it at all, than hear it ill read; and to those who love Architecture, the life and accent of the hand are everything. They had rather not have ornament at all, than see it ill cut---deadly cut, that is. I cannot too often repeat, it is not coarse cutting, it is not blunt cutting, that is necessarily bad; but it is cold cutting---the look of equal trouble everything---the smooth, diffused tranquility of heartless pains---the regularity of a plough in a level field. The chill is more likely, indeed, to show itself in finished work than in any other---men cool and tire as they complete: and if completeness is thought to be vested in polish, and to be attainable by help of sand paper, we may as well give the work to the engine lathe at once. But right finish is simply the full rendering of the intended impression; and high finish is the rendering of a well intended and vivid impression; and it is oftener got by rough than fine handling."
John Ruskin, The Seven Lamps of Architecture, aphorism 25