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Of the Overflowing of the Nile.
Thales conjectures that the Etesian or anniversary northern winds blowing strongly against Egypt heighten the swelling of the Nile, the mouth of that river being obstructed by the force of the sea rushing into it. Euthymenes the Massilian concludes that the Nile is filled by the ocean and that sea which is outward from it, the last being naturally sweet. Anaxagoras, that the snow in Ethiopia which is frozen in winter is melted in summer, and this makes the inundation. Democritus, that the snows which are in the northern climates when the sun enters the summer solstice are dissolved and diffused; from those vapors clouds are compacted, and these are forcibly driven by the Etesian winds into the southern parts and into Egypt, from whence violent showers are poured; and by this means the fens of Egypt are filled with water, and the river Nile hath its inundation. Herodotus the historian, that the waters of the Nile receive from their fountain an equal portion of water in winter and in summer; but in winter the water appears less, because the sun, making its approach nearer to Egypt, draws up the rivers of that country into exhalation. Ephorus the historiographer, that in summer all Egypt seems to be melted and sweats itself into water, to which the thin and sandy soils of Arabia and Lybia contribute. Eudoxus relates that the Egyptian priests affirm that, when it is summer to us who dwell under the northern tropic, it is winter with them that inhabit under the southern tropic; by this means there is a various contrariety and opposition of the seasons in the year, which cause such showers to fall as make the water to overflow the banks of the Nile and diffuse itself throughout all Egypt.
Of the Soul.
Thales first pronounced that the soul is that being which is in a perpetual motion, or that whose motion proceeds from itself. Pythagoras, that it is a number moving itself; he takes a number to be the same thing with a mind. Plato, that it is an intellectual substance moving itself, and that motion is in a numerical harmony. Aristotle, that it is the first actuality [Greek ommitted] of a natural organical body which has life potentially; and this actuality must be understood to be the same thing with energy or operation. Dicaearchus, that it is the harmony of the four elements. Asclepiades the physician, that it is the concurrent exercitation of the senses.
Whether the Soul be a Body, and what is the Nature and Essence of It.
All those named by me do affirm that the soul itself is incorporeal, and by its own nature is in a motion, and in its own self is an intelligent substance, and the living actuality of a natural organical body. The followers of Anaxagoras, that it is airy and a body. The Stoics, that it is a hot exhalation. Democritus, that it is a fiery composition of things which are perceptible by reason alone, the same having their forms spherical and without an inflaming faculty; and it is a body. Epicurus, that it is constituted of four qualities, of a fiery quality, of an aerial quality, a pneumatical, and of a fourth quality which hath no name, but it contains the virtue of the sense. Heraclitus, that the soul of the world is the exhalation which proceeds from the moist parts of it; but the soul of animals, arising from exhalations that are exterior and from those that are within them, is homogeneous to it.
Of the Parts of the Soul.
Plato and Pythagoras, according to their first account, distribute the soul into two parts, the rational and irrational. By a more accurate and strict account the soul is branched into three parts; they divide the unreasonable part into the concupiscible and the irascible. The Stoics say the soul is constituted of eight parts; five of which are the senses, hearing, seeing, tasting, touching, smelling, the sixth is the faculty of speaking, the seventh of generating, the eighth of commanding; this is the principal of all, by which all the other are guided and ordered in their proper organs, as we see the eight arms of a polypus aptly disposed. Democritus and Epicurus divide the soul into two parts, the one rational, which bath its residence in the breast, and the irrational, which is diffused through the whole structure of the body. Democritus, that the quality of the soul is communicated to everything, yea, to the dead corpses; for they are partakers of heat and some sense, when the most of both is expired out of them.
What is the Principal Part of the Soul, and in what Part of the Body it Resides.
Plato and Democritus place its residence in the whole head. Strato, in that part of the forehead where the eyebrows are separated. Erasiatratus, in the Epikranis, or membrane which involves the brain. Herophilus, in that sinus of the brain which is the basis of it. Parmenides, in the breast; which opinion is embraced by Epicurus. The Stoics are generally of this opinion, that the seat of the soul is throughout the heart, or in the spirit about it. Diogenes, in the arterial ventricle of the heart, which is also full of vital spirit. Empedocles, in the mass of the blood. There are that say it is in the neck of the heart, others in the pericardium, others in the midriff. Certain of the Neoterics, that the seat of the soul is extended from the head to the diaphragm. Pythagoras, that the animal part of the soul resides in the heart, the intellectual in the head.
Of the Motion of the Soul.
Plato believes that the soul is in perpetual motion, but that it is immovable as regards motion from place to place. Aristotle, that the soul is not naturally moved, but its motion is accidental, resembling that which is in the forms of bodies.
Of the Soul’s Immortality.
Plato and Pythagoras say that the soul is immortal; when it departs out of the body, it retreats to the soul of the world, which is a being of the same nature with it. The Stoics, when the souls leave the bodies, they are carried to divers places; the souls of the unlearned and ignorant descend to the coagmentation of earthly things, but the learned and vigorous last till the general fire. Epicurus and Democritus, the soul is mortal, and it perisheth with the body. Plato and Pythagoras, that part of the soul of man which is rational is eternal; for though it be not God, yet it is the product of an eternal deity; but that part of the soul which is divested of reason dies.
Of the Senses, and of Those Things which are Objects of the Senses,
The Stoics give this definition of sense: Sense is the Apprehension or comprehension of an object by means of an organ of sensation. There are several ways of expressing what sense is; it is either a habit, a faculty, an operation, or an imagination which apprehends by means of an organ of sense — and also the eighth principal thing, from whence the senses originate. The instruments of sense are intelligent exhalations, which from the said commanding part extend unto all the organs of the body. Epicurus, that sense is a faculty, and that which is perceived by the sense is the product of it; so that sense hath a double acceptation — sense which is the faculty, and the thing received by the sense, which is the effect. Plato, that sense is that commerce which the soul and body have with those things that are exterior to them; the power of which is from the soul, the organ by which is from the body; but both of them apprehend external objects by means of the imagination. Leucippus and Democritus, that sense and intelligence arise from external images; so neither of them can operate without the assistance of image falling upon us.
Whether what Appears to Our Senses and Imaginations be True or Not.
The Stoics say that what the senses represent is true; what the imagination, is partly false, partly true. Epicurus that every impression of the sense or imagination is true, but of those things that fall under the head of opinion, some are true, some false: sense gives us a false presentation of those things only which are the objects of our understanding; but the imagination gives us a double error, both of things sensible and things intellectual. Empedocles and Heraclides, that the senses act by a just accommodation of the pores in every case; everything that is perceived by the sense being congruously adapted to its proper organ.
How Many Senses are There?
The Stoics say that there are five senses properly so called, seeing, hearing, smelling, tasting. and touching. Aristotle indeed doth not add a sixth sense; but he assigns a common sense, which is the judge of all compounded species; into this each sense casts its proper representation, in which is discovered a transition of one thing into another, like as we see in figure and motion where there is a change of one into another. Democritus, that there are divers species of senses, which appertain to beings destitute of reason, to the gods, and to wise men.
How the Actions of the Senses, the Conceptions of Our Minds, and the Habit of Our Reason are Formed.
The Stoics affirm that every man, as soon as he is born, has a principal and commanding part of his soul, which is in him like a sheet of writing-paper, to which he commits all his notions. The first manner of his inscribing is by denoting those notions which flow from the senses. Suppose it be of a thing that is white; when the present sense of it is vanished, there is yet retained the remembrance; when many memorative notions of the same similitude do concur, then he is said to have an experience; for experience is nothing more than the abundance of notions that are of the same form met together. Some of these notions are naturally begotten according to the aforesaid manner, without the assistance of art; the others are produced by discipline, learning, and industry; these only are justly called notions, the others are prenotions. But reason, which gives us the denomination of rational, is completed by prenotions in the first seven years. The conception of the mind is the vision that the intelligence of a rational animal hath received; when that vision falls upon the rational soul, then it is called the conception of the mind, for it hath derived its name from the mind [Greek omitted] from [Greek omitted]. Therefore these visions are not to be found in any other animals; they only are appropriated to gods and to us men. If these we consider generally, they are phantasms; if specifically, they are notions. As pence or staters, if you consider them according to their own value, are simply pence and staters; but if you give them as a price for a naval voyage, they are called not merely pence, etc., but your freight.