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. 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. It stands or falls with faith in God.
At bottom every man knows well enough that he is a unique being, only once on this earth; and by no extraordinary chance will such a marvelously picturesque piece of diversity in unity as he is, ever be put together a second time.
He who knows not how to plant his will in things at least endows them with some meaning: that is to say, he believes that a will is already present in them (A principle of faith.)
Once we have found ourselves, we must understand how from time to time to lose--and then to find--ourselves once again: assuming,that is, that we are thinkers. For a thinker it is a drawback to be bound to a single person all the time.