"Often enough, and always with great consternation, people have told me that there is something distinctive in all my writings, from The Birth of Tragedy to the most recently published Prologue to a Philosophy of the Future. All of them, I have been told, contains snares and nets for careless birds, and almost , unperceived challenge to reverse one's habitual estimations esteemed habits. 'What's that? Everything is only-human, all too human?"
January 1, 1970
https://en.wikiquote.org/wiki/Human%2C_All_Too_Human