In truth, the present philippic is as necessary to the completeness of the whole of Nietzsche's system as the keystone is to the arch. All the curves of his speculation lead up to it. What he flung himself against, from beginning to end of his days of writing, was always, in the last analysis, Christianity in some form or other Christianity as a system of practical ethics, Christianity as a political code, Christianity as meta physics, Christianity as a gauge of the truth. It would be difficult to think of any intellectual enterprise on his long list that did not, more or less directly and clearly, relate itself to this master enterprise of them all. It was as if his apostasy from the faith of his fathers, filling him with the fiery zeal of the convert, and particularly of the convert to heresy, had blinded him to every other element in the gigantic self-delusion of civilized man.