Perhaps the commonest expression of this assumption that spiritual value is undone if lowly origin be asserted is seen in those comments which unsentimental people so often pass on their more sentimental acquaintances. Alfred believes in immortality so strongly because his temperament is so emotional. Fanny’s extraordinary conscientiousness is merely a matter of over-instigated nerves. William’s melancholy about the universe is due to bad digestion — probably his liver is torpid. Eliza’s delight in her church is a symptom of her hysterical constitution. Peter would be less troubled about his soul if he would take more exercise in the open air, etc. A more fully developed example of the same kind of reasoning is the fashion, quite common nowadays among certain writers, of criticising the religious emotions by showing a connection between them and the sexual life. Conversion is a crisis of puberty and adolescence. The macerations of saints, and the devotion of missionaries, are only instances of the parental instinct of self-sacrifice gone astray. For the hysterical nun, starving for natural life, Christ is but an imaginary substitute for a more earthly object of affection. And the like.

We are surely all familiar in a general way with this method of discrediting states of mind for which we have an antipathy. We all use it to some degree in criticising persons whose states of mind we regard as overstrained. But when other people criticise our own more exalted soul-flights by calling them “nothing but” expressions of our organic disposition, we feel outraged and hurt, for we know that, whatever be our organism’s peculiarities, our mental states have their substantive value as revelations of the living truth; and we wish that all this medical materialism could be made to hold its tongue.

Medical materialism seems indeed a good appellation for the too simple-minded system of thought which we are considering. Medical materialism finishes up Saint Paul by calling his vision on the road to Damascus a discharging lesion of the occipital cortex, he being an epileptic. It snuffs out Saint Teresa as an hysteric, Saint Francis of Assisi as an hereditary degenerate. George Fox’s discontent with the shams of his age, and his pining for spiritual veracity, it treats as a symptom of a disordered colon. Carlyle’s organ-tones of misery it accounts for by a gastro-duodenal catarrh. All such mental over- tensions, it says, are, when you come to the bottom of the matter, mere affairs of diathesis (auto-intoxications most probably), due to the perverted action of various glands which physiology will yet discover.

And medical materialism then thinks that the spiritual authority of all such personages is successfully undermined.

Let us ourselves look at the matter in the largest possible way. Modern psychology, finding definite psycho-physical connections to hold good, assumes as a convenient hypothesis that the dependence of mental states upon bodily conditions must be thorough- going and complete. If we adopt the assumption, then of course what medical materialism insists on must be true in a general way, if not in every detail: Saint Paul certainly had once an epileptoid, if not an epileptic seizure; George Fox was an hereditary degenerate; Carlyle was undoubtedly auto-intoxicated by some organ or other, no matter which, — and the rest. But now, I ask you, how can such an existential account of facts of mental history decide in one way or another upon their spiritual significance? 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. When it alters in one way the blood that percolates it, we get the methodist, when in another way, we get the atheist form of mind. So of all our raptures and our drynesses, our longings and pantings, our questions and beliefs. They are equally organically founded, be they of religious or of non-religious content.

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 have 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 their possessor’s body at the time.

William James, The Varieties of Religious Experience: A Study in Human Nature, London, 1902, lecture 1