Beyond Good and Evil, sec. 21 (tr. W. Kaufmann):
The causa sui is the best self-contradiction that has been conceived so far, it is a sort of rape and perversion of logic; but the extravagant pride of man has managed to entangle itself profoundly and frightfully with just this nonsense. The desire for "freedom of the will" in the superlative metaphysical sense, which still holds sway, unfortunately, in the minds of the half-educated; the desire to bear the entire and ultimate responsibility for one's actions oneself, and to absolve God, the world, ancestors, chance and society involves nothing less than to be precisely this causa sui and, with more than Muenchhausen's audacity, to pull oneself up into existence by the hair, out of the swamps of nothingness.
It is easy to be seduced by the beauty and energy of Nietzsche's prose into thinking that he is talking sense when he is not. The above excerpt is a case in point. Let's take a long hard logical squint at it.