But in the languid brain of an idiot excitement may even produce rationality.
Samuel Tuke tells us of a domestic servant, who lapsed into a state of complete idiocy. Some time after, she fell into typhus fever, and as this progressed, there was a real development of mental power. At that stage when delirium lighted up the minds of others, she was rational, because the excitement merely brought up the nervous energy to its proper point. As the fever abated, however, she sunk into her idiot apathy, and thus continued until she died. It was but the transient gleam of reason.
PHANTASY FROM CEREBRAL CONGESTION.—OPIUM.
——“Have we eaten of the insane root,
That takes the reason prisoner?”
Macbeth.
Ev. The contrasts to these phantoms of blind superstition, are those of the overstrained condition of the mind. The Creator has ordained the brain to be the soil in which the mind is implanted or developed. This brain, like the corn-field, must have its fallow, or it is exhausted and reduced in the degree of its high qualities. In our intellectual government, therefore, we should ever adopt that happy medium, equally remote from the bigotry of the untutored, and the ultra refinement of the too highly cultivated mind.
It is not essential that I should now offer you more than a hint, that the essence of the gloomy ghosts of deep study, like the melancholy phantoms and oppressive demons of the night-mare, consists in the accumulation of black blood about the brain and the heart; and a glance at phrenology would explain to you how the influence of that blood on the various divisions of the brain will call up in the mind these “Hydras and Gorgons, and Chimeras dire.”
The learned Pascal constantly saw a gulph yawning at his side, but he was aware of his illusion. He was, however, always strapped in his chair, lest he should fall into this gulph, especially while he was working the celebrated problem of the cycloidal curve.
A distinguished nobleman, who but lately guided the helm of state in England, was often annoyed by the spectre of a bloody head;—a strange coincidence with the phantom of the Count Duke d’Olivarez, the minister of Philip of Spain.