‘Now we reach one stage further in what I shall call the intellectual descent that the Theists have made in their argumentations, and we come to what are called the moral arguments for the existence of God. You all know, of course, that there used to be in the old days three intellectual arguments for the existence of God, all of which were disposed of by Immanuel Kant in the Critique of Pure Reason; but no sooner had he disposed of those arguments than he invented a new one, a moral argument, and that quite convinced him. He was like many people: in intellectual matters he was skeptical, but in moral matters he believed implicitly in the maxims that he had imbibed at his mother’s knee. That illustrates what the psychoanalysts so much emphasize — the immensely stronger hold upon us that our very early associations have than those of later times.
Kant, as I say, invented a new moral argument for the existence of God, and that in varying forms was extremely popular during the nineteenth century. It has all sorts of forms. One form is to say there would be no right or wrong unless God existed. I am not for the moment concerned with whether there is a difference between right and wrong, or whether there is not: that is another question. The point I am concerned with is that, if you are quite sure there is a difference between right and wrong, then you are in this situation: Is that difference due to God’s fiat or is it not? If it is due to God’s fiat, then for God himself there is no difference between right and wrong, and it is no longer a significant statement to say that God is good. If you are going to say, as theologians do, that God is good, you must then say that right and wrong have some meaning which is independent of God’s fiat, because God’s fiats are good and not bad independently of the mere fact that he made them. If you are going to say that, you will then have to say that it is not only through God that right and wrong came into being, but that they are in their essence logically anterior to God. You could, of course, if you liked, say that there was a superior deity who gave orders to the God that made this world, or could take up the line that some of the gnostics took up — a line which I often thought was a very plausible one — that as a matter of fact this world that we know was made by the devil at a moment when God was not looking. There is a good deal to be said for that, and I am not concerned to refute it.’
– Denonn. L.E., Egner. R.E. Ed. 1961. The Basic Writings of Bertrand Russell London, United Kingdom: George Allen & Unwin (1962) p. 589-590
Bertrand Russell delivered the lecture Why I am not a Christian (of which this is an excerpt) on March 6, 1927 to the National Secular Society, South London Branch, at Battersea Town Hall.