Nietzsche, from Human All Too Human:

“Future of science. — To the man who works and searches in it, science gives much pleasure; to the man who learns its results, very little. But since all important scientific truths must eventually become everyday and commonplace, even this small amount of pleasure ceases; just as we have long ago ceased to enjoy learning the admirable multiplication tables. Now, if science produces ever less joy in itself and takes ever greater joy in casting suspicion on the comforts of metaphysics, religion, and art, then the greatest source of pleasure, to which mankind owes almost its whole humanity, is impoverished. Therefore a higher culture must give man a double brain, two brain chambers, as it were, one to experience science, and one to experience nonscience. Lying next to one another, without confusion, separable, self-contained: our health demands this. In the one domain lies the source of strength, in the other the regulator. Illusions, biases, passions must give heat; with the help of scientific knowledge, the pernicious and dangerous consequences of overheating must be prevented. — If this demand made by higher culture is not satisfied, we can almost certainly predict the further course of human development: interest in truth will cease, the less it gives pleasure; illusion, error, and fantasies, because they are linked with pleasure, will reconquer their former territory step by step; the ruin of the sciences and relapse into barbarism follow next. Mankind will have to begin to weave its cloth from the beginning again, after having, like Penelope, destroyed it in the night. But who will guarantee that we will keep finding the strength to do so?”