Erewhon by Samuel Butler

Of genius they make no account, for they say that everyone is a genius, more or less. No one is so physically sound that no part of him will be even a little unsound, and no one is so diseased but that some part of him will be healthy -- so no man is so mentally and morally sound, but that he will be in part both mad and wicked; and no man is so mad and wicked but he will be sensible and honourable in part. In like manner there is no genius who is not also a fool, and no fool who is not also a genius.

When I talked about originality and genius to some gentlemen whom I met at a supper party given by Mr. Thims in my honour, and said that original thought ought to be encouraged, I had to eat my words at once. Their view evidently was that genius was like offences -- needs must that it come, but woe unto that man through whom it comes. A man's business, they hold, is to think as his neighbours do, for Heaven help him if he thinks good what they count bad. And really it is hard to see how the Erewhonian theory differs from our own, for the word "idiot" only means a person who forms his opinions for himself.