Friedrich Nietzsche

 Human, All Too Human: A Book for Free Spirits

Occasionally harsh, powerful, impetuous, yet nevertheless backward spirits, appear, who try to conjure back some past era in the history of mankind: they serve as evidence that the new tendencies which they oppose, are not yet potent enough, that there is something lacking in them: otherwise they [the tendencies] would better withstand the effects of this conjuring back process.

We see all things through the medium of the human head and we cannot well cut off this head: although there remains the question what part of the world would be left after it had been cut off.

Everything is merely—human—all too human?