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FROM "DEMONIACAL POSSESSION" TO INSANITY.
I.THEOLOGICAL IDEAS OF LUNACY AND ITS TREATMENT.
Of all the triumphs won by science for humanity, few have been farther-reaching in good effects than the modern treatment of the insane.

But this is the result of a struggle long and severe between two great forces.

On one side have stood the survivals of various superstitions, the metaphysics of various philosophies, the dogmatism of various theologies, the literal interpretation of various sacred books, and especially of our own--all compacted into a creed that insanity is mainly or largely demoniacal possession; on the other side has stood science, gradually accumulating proofs that insanity is always the result of physical disease.
I purpose in this chapter to sketch, as briefly as I may, the history of this warfare, or rather of this evolution of truth out of error.
Nothing is more simple and natural, in the early stages of civilization, than belief in occult, self-conscious powers of evil.

Troubles and calamities come upon man; his ignorance of physical laws forbids him to attribute them to physical causes; he therefore attributes them sometimes to the wrath of a good being, but more frequently to the malice of an evil being.
Especially is this the case with diseases.