Chapter XII: Of Bodies

A body is that being which hath these three dimensions, breadth, depth, and length;—or a bulk which makes a sensible resistance;—or whatsoever of its own nature possesseth a place.

Plato saith that it is neither heavy nor light in its own nature, when it exists in its own place; but being in the place where another should be, then it has an inclination by which it tends to gravity or levity.

Aristotle saith that, if we simply consider things in their own nature, the earth only is to be judged heavy, and fire light; but air and water are sometimes heavy and sometimes light.

The Stoics think that of the four elements two are light, fire and air; two ponderous, earth and water; that which is naturally light doth by its own nature, not by any inclination, recede from its own centre; but that which is heavy doth by its own nature tend to its centre; for the centre is not a heavy thing of itself.

Epicurus thinks that bodies are not to be limited; but the first bodies, which are simple bodies, and all those composed of them, all acknowledge gravity; that all atoms are moved, some perpendicularly, some obliquely; some are carried aloft either by direct impulse or with vibrations.

CHAPTER XIII.

OF THOSE THINGS THAT ARE LEAST IN NATURE.

Empedocles, precedent to the four elements, introduceth the most minute bodies which resemble elements; but they did exist before the elements, having similar parts and orbicular.

Heraclitus brings in the smallest fragments, and those indivisible.

CHAPTER XIV.

OF FIGURES.

A figure is the exterior appearance, the circumscription, and the boundary of a body.

The Pythagoreans say that the bodies of the four elements are spherical, fire being in the supremest place only excepted, whose figure is conical.

CHAPTER XV.

OF COLORS.

Color is the visible quality of a body.

The Pythagoreans called color the outward appearance of a body. Empedocles, that which is consentaneous to the passages of the eye. Plato, that they are fires emitted from bodies, which have parts harmonious for the sight. Zeno the Stoic, that colors are the first figurations of matter. The Pythagoreans, that colors are of four sorts, white and black, red and pale; and they derive the variety of colors from the diversity of the elements, and that seen in animals also from the variety of food and the air in which they live and are bred.

CHAPTER XVI.

OF THE DIVISION OF BODIES.

The disciples of Thales and Pythagoras grant that all bodies are passible and divisible unto infinity. Others hold that atoms and indivisible parts are there fixed, and admit not of a division into infinity. Aristotle, that all bodies are potentially but not actually divisible into infinity.

CHAPTER XVII.

HOW BODIES ARE MIXED AND CONTEMPERATED ONE WITH ANOTHER.

The ancient philosophers held that the mixture of elements proceeded from the alteration of qualities; but the disciples of Anaxagoras and Democritus say it is done by apposition. Empedocles composes the elements of still smaller bulks, those which are the most minute and may be termed the elements of elements. Plato assigns three bodies (but he will not allow these to be elements, nor properly so called), air, fire, and water, which are mutable into one another; but the earth is mutable into none of these.

CHAPTER XVIII.

OF A VACUUM.

All the natural philosophers from Thales to Plato rejected a vacuum. Empedocles says that there is nothing of a vacuity in nature, nor any thing superabundant. Leucippus, Democritus, Demetrius, Metrodorus, Epicurus, that the atoms are infinite in number; and that a vacuum is infinite in magnitude. The Stoics, that within the compass of the world there is no vacuum, but beyond it the vacuum is infinite. Aristotle,[42] that the vacuum beyond the world is so great that the heaven has liberty to breathe into it, for the heaven is fiery.

CHAPTER XIX.

OF PLACE.

Plato, to define place, calls it that thing which in its own bosom receives forms and ideas; by which metaphor he signifies matter, being (as it were) a nurse or receptacle of beings. Aristotle, that it is the ultimate superficies of the circumambient body, contiguous to that which it doth encompass.

CHAPTER XX.

OF SPACE.

The Stoics and Epicureans make a place, a vacuum, and a space to differ. A vacuum is that which is void of any thing that may be called a body; place is that which is possessed by a body; a space that which is partly filled with a body, as a cask with wine.

CHAPTER XXI.

OF TIME.

In the sense of Pythagoras, time is that sphere which encompasses the world. Plato says that it is a movable image of eternity, or the interval of the world’s motion. Eratosthenes, that it is the solar motion.

CHAPTER XXII.

OF THE ESSENCE AND NATURE OF TIME.

Plato says that the heavenly motion is time. Most of the Stoics affirm that motion itself is time. Most philosophers think that time had no beginning; Plato, that time had only an ideal beginning.

CHAPTER XXIII.

OF MOTION.

Plato and Pythagoras say that motion is a change and alteration in matter. Aristotle, that it is the actual operation of that which may be moved. Democritus, that there is but one sort of motion, and it is that which is vibratory. Epicurus, that there are two species of motion, one perpendicular, and the other oblique. Herophilus, that one species of motion is obvious only to reason, the other to sense. Heraclitus utterly denies that there is any thing of quiet or repose in nature; for that is the state of the dead; one sort of motion is eternal, which he assigns to beings eternal, the other perishable, to those things which are perishable.

CHAPTER XXIV.

OF GENERATION AND CORRUPTION.

Parmenides, Melissus, and Zeno deny that there are any such things as generation and corruption, for they suppose that the universe is unmovable. Empedocles, Epicurus, and other philosophers that combine in this, that the world is framed of small corporeal particles meeting together, affirm that corruption and generation are not so properly to be accepted; but there are conjunctions and separations, which do not consist in any alteration according to their qualities, but are made according to quantity by coalition or disjunction. Pythagoras, and all those who take for granted that matter is subject to mutation, say that generation and corruption are to be accepted in their proper sense, and that they are accomplished by the alteration, mutation, and dissolution of elements.

CHAPTER XXV.

OF NECESSITY.

Thales says that necessity is omnipotent, and that it exerciseth an empire over every thing. Pythagoras, that the world is invested by necessity. Parmenides and Democritus, that there is nothing in the world but what is necessarily, and that this same necessity is otherwise called fate, justice, providence, and the architect of the world.

CHAPTER XXVI.

OF THE NATURE OF NECESSITY.

Plato distinguisheth and refers some things to Providence, others to necessity. Empedocles makes the nature of necessity to be that cause which employs principles and elements. Democritus makes it to be a resistance, impulse, and force of matter. Plato sometimes says that necessity is matter; at other times, that it is the habitude or respect of the efficient cause towards matter.

CHAPTER XXVII.

OF DESTINY OR FATE.

Heraclitus, who attributes all things to fate, makes necessity to be the same thing with it. Plato admits of a necessity in the minds and the actions of men, but yet he introduceth a cause which flows from ourselves. The Stoics, in this agreeing with Plato, say that necessity is a cause invincible and violent; that fate is the ordered complication of causes, in which there is an intexture of those things which proceed from our own determination, so that some things are to be attributed to fate, others not.