They are rid of the Christian God and now believe all the more firmly that they must cling to Christian morality. That is an English consistency; we do not wish to hold it against little moralistic females à la Eliot. In England one must rehabilitate oneself after every little emancipation from theology by showing in a veritably awe-inspiring manner what a moral fanatic one is. That is the penance they pay there.
We others hold otherwise. When one gives up the Christian faith, one pulls the right to Christian morality out from under one's feet. This morality is by no means self-evident: this point has to be exhibited again and again, despite the English flatheads. Christianity is a system, a whole view of things thought out together. By breaking one main concept out of it, the faith in God, one breaks the whole: nothing necessary remains in one's hands. Christianity presupposes that man does not know, cannot know, what is good for him, what evil: he believes in God, who alone knows it. Christian morality is a command; its origin is transcendent; it is beyond all criticism, all right to criticism; it has truth only if God is the truth — it stands and falls with faith in God.
When the English actually believe that they know "intuitively" what is good and evil, when they therefore suppose that they no longer require Christianity as the guarantee of morality, we merely witness the effects of the dominion of the Christian value judgment and an expression of the strength and depth of this dominion: such that the origin of English morality has been forgotten, such that the very conditional character of its right to existence is no longer felt. For the English, morality is not yet a problem.
Friedrich Nietzsche, Twilight of the Idols, "Skirmishes of an untimely man," § 5 (about G. Eliot).
When the Christian crusaders in the Orient came across that unconquered Order of Assassins, that free-spirited order par excellence, whose lowest ranks lived a life of obedience of the sort no order of monks attained, then they received by some means or other a hint about that symbol and motto, which only the highest ranks kept as their secret, "Nothing is true. Everything is permitted." . . . Well now, that was spiritual freedom. With that the very belief in truth was cancelled. . . Has a European, a Christian free spirit ever wandered by mistake into this proposition and its labyrinthine consequences? Has he come to know the Minotaur of this cavern from his own experience? . . . I doubt it. More that that: I know differently. Nothing is more immediately foreign to people set on one thing, these so-called "free spirits," than freedom and emancipation in this sense. In these matters they are more firmly bound, because they believe in the truth, as no one else does, firmly and unconditionally.
Friedrich Nietzsche, On the Genealogy of Morals, III, 24. (about post-Christian "free thought").
"All things are lawful," but not all things are beneficial. "All things are lawful," but not all things build up. Do not seek your own advantage, but that of the other.
Paul, 1 Corinthians 10:23f.