CHAP. VI. Of Imagination.
I. Whence arises the diversity of Wit and Imagina∣tion. ALMOST all Men differ some way or other in Wit, and Imagination.
This chiefly proceeds from the various Confor∣mation, Figure and Magnitude of the Brain, Texture of parts, substance and motion of Animal Spirits. For all these things very greatly conduce to the quickness or slowness of Wit and Imagina∣tion. Forasmuch as if the bulk of the Brain be either lesser or bigger than is fit, the Wit will ei∣ther be precipitate or slow; either because the Spi∣rits themselves have not a passage free and open enough, or because the equal motion of them is put out of order through the default of the Figure; or perhaps because in a larger bulk the Contex∣ture of the minute parts is courser, or there is some other more occult Cause, which represents the Images of things distorted or ill delineated.
II. Whenee proceeds the vari∣ous Inclina∣tions of Men, some to one Art or Science, some to another. Whence according to the various degrees of Imagination, Men are variously carried by a cer∣tain innate Inclination, some to the Mathemati∣cal Arts, others to Eloquence and Poetry, others to the Art of Medicin, that is, the Practice; for the speculation thereof, which comprehends the Principles and Rules of Medicin more properly relates to the Intellect or Understanding; as the Practick Part of it which examins all the Indica∣tions and Circumstances of a Disease, and takes opportunities of healing, belongs chiefly to the Imagination: Whence it happens that the most learned and acute Physitians are not always the most happy in curing of Diseases. The same thing is for the most part observable in other Sci∣ences: For those Men who are the most Learned and Skilful in the Law, are judged the least fit for other Civil Imployments.
III. Many things oc∣cur to our Imagina∣tion, which never of∣fer'd them∣selves to our Senses. Many things, through our inadvertency, oc∣cur, which before were never offered to our Senses, not left any Vestigium of themselves; as when, for Example, we conceive in our Imagination a Hippocentaur, and other Chimaera's, which never presented themselves to our Eyes, such as we form'd them in our Fancy.
But tho' perchance those things which we conceive in our Imagination, were not before in our Senses, as to their Composition; nevertheless it cannot be doubted, but that the parts of which they were constituted, have at some time or other entred the Brain; or if haply not by themselves, yet by some other thing which had a great affinity with them. For if a Horse and a Man, for example, be represented to our Eyes, and the Species of both be imprest upon the Organ of Imagination, we easily compound them together, and conceive a Hippocentaur or Animal, consisting of Man and Horse. In like manner we may determin of the vestigia of other Objects, by the sight whereof we form many things which before fell not under our Senses.
IV. Why those that look upon the ground from any high place, are taken with a Ver∣tigo. They who, not being so accustomed, pass over high Bridges, or from a high Tower cast their Eyes upon the ground, are commonly taken with a Vertigo, and fancy all visible Objects to turn round.
This proceeds from Imagination, which appre∣hends danger from the situation or posture of the Body, and dreads the hapning of any mischief to it, whence being very cautious how it transmits the Spirits into the Nerves, and how to direct them more securely, it recalls them into the Me∣ditullium or inmost part of the Brain, and so per∣verts them from their accustomed afflux and Irra∣diation; and while it indeavours to direct them into better order, overmuch sollicitude compels them into a certain confusion and irregular moti∣on. And for this very Reason it is, that bold Per∣sons, and Men in Drink, in regard they take little care of the Regimen or Government of the Ani∣mal Spirits, suffer no such Vertigo.
V. Why Men in a Fever fancy they suffer th••se things which they really do not. Some Men seised with a Disease, especially those in a Fever, fancy they do or suffer many things which indeed they do not: For I have known one in a Tertian Ague often complaining that he was grievously afflicted with a wound in his Shoulder, when at the same time he had in reality no wound at all.
This happens by reason that the Species which are imprest by the course of the Spirits, or raised by means of the Vestigia of the Memory are equal∣ly vivacious, and indued with no less strength than those which proceed from the Senses. For when at that time the Animal Spirits are agitated above what health requires, they concur with the Vesti∣gia of the memory to the creation of other Species, which represent all things to us as being without us, and present to our Senses. It also happens sometimes in a Disease, that Objects make no im∣pression with which the Mind can compare those Species, which the memory, or the force of the Spirits there ingender.
VI. Witches in Imagina∣tion, see places f•••• remote. Thus it is probable that Witches, buried in a deep sleep, imagine they see Places far remote, Towns, Cities, Palaces, Troops of Men and Wo∣men, &c. and being awake describe them to a tittle, as if they had seen them with their Eyes. Which doubtless is done by the help of the Devil, who represents the Ideas of those things to their Imagination, and so strongly imprints it in them, that they make no manner of doubt but that they were present at those sorts of Shows.