“Your wonderment 'what I have against religion' reminds me of your recent Vagrant essay… To my mind, that essay misses one point altogether. Your "agnostic" has neglected to mention the very crux of all agnosticism—namely that the Judaeo-Christian mythology is NOT TRUE. I can see that in your philosophy truth per se has so small a place, that you can scarcely realise what it is that Galpin and I are insisting upon. In your mind, MAN is the centre of everything, and his exact conformation to certain regulations of conduct HOWEVER EFFECTED, the only problem in the universe. Your world (if you will pardon my saying so) is contracted. All the mental vigour and erudition of the ages fail to disturb your complacent endorsement of empirical doctrines and purely pragmatical notions, because you voluntarily limit your horizon—excluding certain facts, and certain undeniable mental tendencies of mankind. In your eyes, man is torn between only two influences; the degrading instincts of the savage, and the temperate impulses of the philanthropist. To you, men have but two types of emotion—lovers of the self and lovers of the race…. You are forgetting a human impulse which, despite its restriction to a relatively small number of men, has all through history proved itself as real and as vital as hunger—as potent as thirst or greed. I need not say that I refer to that simplest yet most exalted attribute of our species—the acute, persistent, unquenchable craving TO KNOW. Do you realise that to many men it makes a vast and profound difference whether or not the things about them are as they appear?… If TRUTH amounts to nothing, then we must regard the phantasma of our slumbers just as seriously as the events of our daily lives…. I recognise a distinction between dream life and real life, between appearances and actualities. I confess to an over-powering desire to know whether I am asleep or awake—whether the environment and laws which affect me are external and permanent, or the transitory products of my own brain. I admit that I am very much interested in the relation I bear to the things about me—the time relation, the space relation, and the causative relation. I desire to know approximately what my life is in terms of history—human, terrestrial, solar, and cosmical; what my magnitude may be in terms of extension,—terrestrial, solar, and cosmical; and above all, what may be my manner of linkage to the general system—in what way, through what agency, and to what extent, the obvious guiding forces of creation act upon me and govern my existence. And if there be any less obvious forces, I desire to know them and their relation to me as well.”

Letter to Maurice W. Moe (15 May 1918), in Selected Letters I, 1911-1924 edited by August Derleth and Donald Wandrei, p. 60
Non-Fiction, Letters