During this forced break from writing, I’m re-reading William James, Varieties of Religious Experience and finding it extremely relevant to the unending strife with the new atheists. I’ve decided to post a series of quotes from it as I read through August. You can find the full text at Project Gutenberg.
According to the general postulate of psychology just referred to, there is not a single one of our states of mind, high or low, healthy or morbid, that has not some organic process as its condition. Scientific theories are organically conditioned just as much as religious emotions are; and if we only knew the facts intimately enough, we should doubtless see "the liver" determining the dicta of the sturdy atheist as decisively as it does those of the Methodist under conviction anxious about his soul....
To plead the organic causation of a religious state of mind, then, in refutation of its claim to possess superior spiritual value, is quite illogical and arbitrary, unless one has already worked out in advance some psycho-physical theory connecting spiritual values in general with determinate sorts of physiological change. Otherwise none of our thoughts and feelings, not even our scientific doctrines, not even our DIS-beliefs, could retain any value as revelations of the truth, for every one of them without exception flows from the state of its possessor's body at the time.
It is needless to say that medical materialism draws in point of fact no such sweeping skeptical conclusion. It is sure, just as every simple man is sure, that some states of mind are inwardly superior to others, and reveal to us more truth, and in this it simply makes use of an ordinary spiritual judgment. It has no physiological theory of the production of these its favorite states, by which it may accredit them; and its attempt to discredit the states which it dislikes, by vaguely associating them with nerves and liver, and connecting them with names connoting bodily affliction, is altogether illogical and inconsistent.
William James, Varieties of Religious Experience Lecture I. My bolding.
Just as with Eddington, a lot of what James said is very relevant to the arguments on both sides of the phony religion war. If you haven't read them recently, you will find a lot to think about.