Human, All Too Human: A Book for Free Spirits

It is often enough, and always with great surprise, intimated to me that there is something both ordinary and unusual in all my writings, from the "Birth of Tragedy" to the recently published "Prelude to a Philosophy of the Future": they all contain, I have been told, snares and nets for short sighted birds, and something that is almost a constant, subtle, incitement to an overturning of habitual opinions and of approved customs. What ? Everything is merely-human-all too human?