What I feel I have been trying to think and articulate the past few days has come to me fully-developed from the mouth of a man who died in the mid-1800s:

…We are what is called a “Christian” nation–but in such a sense that not a single one of us is in the character of the Christianity of the New Testament, any more than I am, who again and again have repeated, and do now repeat, that I am only a poet. The illusion of a Christian nation is due doubtless to the power which number exercises over the imagination. I have not the least doubt that every single individual in the nation will be honest enough with God and with himself to say in solitary conversation, “If I must be candid, I do not deny that I am not a Christian in the New Testament sense; if I must be honest, I do not deny that my life cannot be called an effort in the direction what the New Testament calls Christianity, in the direction of denying myself, renouncing the world, dying from it, etc.; rather the earthly and the temporal become more and more important to me with every year I live.” I have not the least doubt that everyone will, with respect to ten of his acquaintances, let us say, be able to hold fast to the view that they are not Christians in the New Testament sense, and that their lives are not even an effort in the direction of becoming so. But when there are 100,000, one becomes confused.

And:

Or (merely to take one example of what is everywhere present in the New Testament): when Christ requires us to save our life eternally (and that surely is what we propose to attain as Christians) and to hate our own life in this world, is there then a single one among us whose life in the remotest degree could be called even the weakest effort in this direction? And perhaps there are thousands of “Christians” in the land who are not so much as aware of this requirement. So then we “Christians” are living, and are loving our life, just in the ordinary human sense. If then by “grace” God will nevertheless regard us as Christians, one thing at least must be required: that we, being precisely aware of the requirement, have a true conception of how infinitely great is the grace that is shown us. “Grace” cannot possibly stretch so far, one thing it must never be used for, it must never be used to suppress or to diminish the requirement; for in that case “grace” would turn Christianity upside down.