A boy, the servant of a medical friend (Mr. A——), was, some years ago, placed under my care for fever, with delirium. About the acme of his disorder the impetuosity of the blood in the vessels of the head was such as to project his ears prominently forwards, like those of a satyr, or, as the gossips thought, rather of a demon. Yet all this subsided as the fever waned.
Yet, believe me, I draw a decided distinction between mania and dreaming; though the phenomena may sometimes bear resemblance. In one essential point they differ; that the transient illusion is not manifested, except during slumber, or a state closely analogous to it, when the senses are languid, or asleep. It is true, however, the maniac will, on his recovery, often dream of the subject of his insanity, yet insanity is more exemplified by action, the dream being usually passive.
The predisposition to insanity is often, too, hereditary, so that the slightest moral influence, imperceptible perhaps to the physician, may incite such a mind to madness; for where there is no predisposition, that is, a perfect integrity of brain, a right judgment is evinced even under the potent influence of the passions.
As the condition of insanity, so the illusive vision, does not always primarily depend on medullary disease; there are primary moral as well as physical causes. But even the exertion of thought, which the ultra spiritualist may term an immaterial faculty, is attended by increased action on the matter of the brain. The organ of mind will, if diseased, (though not always,) produce deranged actions. Yet it is equally true, if even a sound brain be badly instructed, and its passion uncontrolled, insanity may ensue; not however without quickly, I believe immediately, inducing structural change.
On one point, the dream and insanity are often alike; they are mental fulfilments of a wish: and the dreamer, during his slumber, and the madman throughout his derangement, are presented with the spectra of their desires, and their hopes and fears become, for these periods, reality.
It was with a reference to the wanderings of the understanding in dreams, that Sir James Mackintosh thus writes in a letter to Robert Hall:
“These will familiarise your mind to consider its other aberrations as only more rare than sleep and dreams, and, in process of time, they will cease to appear to you much more horrible.”
Astr. And pray, Evelyn, how doth all this profound prosing affect the subject of dreams?
Ev. By similitude. I may even remind you with devout veneration, of the dreams of a prophet, to prove the brain highly sensitive when these visions are before it. Listen to the words of Daniel, to whom “God gave knowledge and skill in all learning and wisdom.”
“I, Daniel, was grieved in my spirit, in the midst of my body, and the visions of my head troubled me.”