. . . We are told again, that our desires and our opinions are carried to their proper object with as invincible a necessity, as a stone or clod of earth is carried downwards; and consequently, that nature has left us nothing in our own power: nor have we any more reason to conclude, that we are free to think, or to desire, after this or that manner, when we see our assent and appetite always moved by the credibility or the desirableness of their objects, than we have, to suppose that a stone can ascend, when we never see it do so.
Now to this it may be replied, that there is a twofold necessity, the one absolutely destructive of free will, the other very consistent with it.
That kind of necessity, which proceeds from any things without us, does indeed take away all liberty and choice; for no man can be said to act freely, when he is compelled by any other external cause, to do a thing, or to leave it undone.
But then there is another sort of necessity from within ourselves, which keeps everything within its due bounds, and obliges each faculty and part to act agreeably to its own nature and original constitution. And this is so far from destroying free will, that it rather preserves and supports it. For by this means it comes to pass, that a free agent can be wrought upon by no other ways, but such as are consistent with the nature of a free agent, which is from a principle of motion within itself.
And this necessity is by no means a mechanical necessity, because it is not imposed by anything from without us; but is what the nature of such an agent admits and requires; what is necessary for its preservation, and for exerting the operations, proper to a creature endued with such a faculty as self-motion.
Besides, if the soul can bring itself to such habits and dispositions as are virtuous or vicious; can grow better by wisdom and sobriety, and worse by perverseness and a dissolute behavior; and can confirm itself in each of these courses, by the frequent repetition of acts suitable to them; then the soul is the true cause of all this.
Though, in truth, it must not be admitted for a general rule neither, that the liberty and power of the will is to be judged of, by men being able to do things, contrary to one another. For the souls immediately united to the original good, prefer that constantly; and yet the freedom of their choice is still the same; for that preference is no more constrained and necessary, than if they took evil instead of it. But it is their excellence and perfection, that they continue steadfast in their own good, and never suffer themselves to be drawn off to the contrary.
But as for our souls, which are more remotely descended from that great original, their desires are according to their tempers and dispositions; those of them that are well disposed, have good desires, and those that are ill, have evil ones: but still these souls of ours are capable of great alterations; they frequently recover themselves from vice to virtue, by reformation and better care; they decline too, and sink down from virtue to vice, by supineness and a foolish neglect; and both these changes are wrought in them by their own voluntary choice, and not by any force or necessity that compels them to it. So that there can be no manner of pretense for charging any part of our wickedness upon God.
He created the soul after such a manner indeed, as to leave it capable of being corrupted; because its essence is not of the first and best sort of natures, but has a mixture of the middle and the lowest; and this mixture was fit, that so all might remain in its perfection; and the first and best continue still such, without degenerating into barrenness, and imperfection, and matter.
God therefore, who is infinitely good himself, made the soul in a capacity of being perverted; and it is an argument of his mercy, and the exceeding riches of his goodness, that he did so: for he has set it above the reach of all external violence and necessity, and made it impossible for it to be corrupted without its own consent.
There is one argument more still behind; which pretends, that a fatal revolution of the heavens has so strong and absolute a power upon us, as not only to influence our actions, but even to determine our choice, and all our inclinations, and leave us no liberty at all to dispose of ourselves, but only the empty name of such a liberty.
Now to these we may answer, that if the rational soul be eternal, and immortal, (which I shall not go about to prove, that being foreign to this subject, but shall desire at present to take for granted, though it must be confessed, not in all points agreeable to the doctrine of the Stoics in this particular, but) if the soul, I say, be eternal and immortal, it cannot be allowed to receive its being from, or to have its dependence upon, matter and motion.
Its instrument indeed, that is, the animal taken in the gross, by which I mean, the body animated by the soul, may owe its nature and its changes to such causes: for material causes produce material effects; and these may differ, according as those causes are differently disposed; with regard to things here below.
And the instrument is formed so, as to be proper and serviceable to the soul, whose business it is to make use of it now; as the difference of tools teaches us to distinguish the several professions that use them, so as to say, these belong to the carpenter’s, those to the mason’s, and others to the smith’s trade; and not only to distinguish the trades themselves, but the skill and capacity of the artificers themselves; to judge of their designs and intentions, and the perfection of the work itself; for those who are masters of their trade, have better tools, and use them with greater dexterity, than others.
In like manner, they who have attained to the knowledge of astrology, find out the nature and temper of the instrument (the body) from the different constitution of material causes, and from hence make their conjectures of the disposition of the soul; and this is the reason, why they often guess aright.
For indeed, the generality of souls, when falling under ill management, and the conversation of naughty men, (a sort of degradation, inflicted upon them by way of punishment, for the loss of their primitive purity) addict themselves too much to the body, and are governed and subdued by it; so as to use it no longer as their instrument of action, but to look upon it as a part and piece of their own essence, and conform their desires to its brutish appetites and inclinations.
Besides, this position, and fatal revolution of the heavens, carries some sort of argument to the production of the souls united to bodies under it, yet not so, as to impose any absolute necessity upon their appetites and inclinations, but only to infer a resemblance of their temper.
For, as in cities, there are some particular solemn seasons and places, which give us good grounds to distinguish the persons assembled in them: as the days and places of public worship commonly call those that are wise, and religious, and well-disposed, together; and those that are set apart for pomp and public sports, gather the rabble, and the idle, and the dissolute; so that the observing these solemnities gives us a clear knowledge of the people that attend upon them: by the same reason, the particular seasons and places, (the houses and conjunctions of the planets) may be able to give us some light, into the temper of the souls united to bodies under them, as carrying some affinity to the conjunctions, under which men are born.
For, when God in his justice has ordained such a particular position, and all the fatalities consequent to it; then those souls, which have deserved this vengeance, are brought under that position. For likeness, and affinity of tempers, has a strange power of bringing all that agree in it together.
This fatal revolution then, does by no means constrain or bind up the soul, nor take away its native freedom; but the soul only bears some resemblance to the temper of this revolution; and is framed agreeably to such a body, as itself has deserved to be given it for its use. And This gives men an opportunity of learning its particular desires and Inclinations, by considering the constellations that people are born under. . . .