From That the taste of good and evil depends in large part on the opinion we have of them:
Indeed, just as study is a torment to a lazy man, abstinence from wine to a drunkard, frugality to the luxurious man, and exercise to a delicate idler, so it is with the rest. Things are not that painful or difficult of themselves; it is our weakness and cowardice that make them so. To judge of great and lofty things we need a soul of the same caliber; otherwise we attribute to them the vice that is our own. A straight oar looks bent in the water. What matters is not merely that we see the thing, but how we see it.