There is a certain Nature through which whatever is exists, and which exists through itself, and is the highest of all existing beings.
THEREFORE, not only are all good things such through something that is one and the same, and all great things such through something that is one and the same; but whatever is, apparently exists through something that is one and the same. For, everything that is, exists either through something, or through nothing. But nothing exists through nothing. For it is altogether inconceivable that anything should not exist by virtue of something.
Whatever is, then, does not exist except through something. Since this is true, either there is one being, or there are more than one, through which all things that are exist. But if there are more than one, either these are themselves to be referred to some one being, through which they exist, or they exist separately, each through itself, or they exist mutually through one another.
But, if these beings exist through one being, then all things do not exist through more than one, but rather through that one being through which these exist.
If, however, these exist separately, each through itself, there is, at any rate, some power or property of existing through self (existendi per se), by which they are able to exist each through itself. But, there can be no doubt that, in that case, they exist through this very power, which is one, and through which they are able to exist, each through itself. More truly, then, do all things exist through this very being, which is one, than through these, which are more than one, which, without this one, cannot exist.
But that these beings exist mutually through one another, no reason can admit; since it is an irrational conception that anything should exist through a being on which it confers existence. For not even beings of a relative nature exist thus mutually, the one through the other. For, though the terms master and servant are used with mutual reference, and the men thus designated are mentioned as having mutual relations, yet they do not at all exist mutually, the one through the other, since these relations exist through the subjects to which they are referred.
Therefore, since truth altogether excludes the supposition that there are more beings than one, through which all things exist, that being, through which all exist, must be one. Since, then, all things that are exist through this one being, doubtless this one being exists through itself. Whatever things there are else then, exist through something other than themselves, and this alone through itself. But whatever exists through another is less than that, through which all things are, and which alone exists through itself. Therefore, that which exists through itself exists in the greatest degree of all things.
There is, then, some one being which alone exists in the greatest and the highest degree of all. But that which is greatest of all, and through which exists whatever is good or great, and, in short, whatever has any existence—that must be supremely good, and supremely great, and the highest of all existing beings.
Chapter IV.
The same subject continued.
FURTHERMORE, if one observes the nature of things he perceives, whether he will or no, that not all are embraced in a single degree of dignity; but that certain among them are distinguished by inequality of degree. For, he who doubts that the horse is superior in its nature to wood, and man more excellent than the horse, assuredly does not deserve the name of man. Therefore, although it cannot be denied that some natures are superior to others, nevertheless reason convinces us that some nature is so preeminent among these, that it has no superior. For, if the distinction of degrees is infinite, so that there is among them no degree, than which no higher can be found, our course of reasoning reaches this conclusion: that the multitude of natures themselves is not limited by any bounds. But only an absurdly foolish man can fail to regard such a conclusion as absurdly foolish. There is, then, necessarily some nature which is so superior to some nature or natures, that there is none in comparison with which it is ranked as inferior.
Now, this nature which is such, either is single, or there are more natures than one of this sort, and they are of equal degree.
But, if they are more than one and equal, since they cannot be equal through any diverse causes, but only through some cause which is one and the same, that one cause, through which they are equally so great, either is itself what they are, that is, the very essence of these natures; or else it is another than what they are.
But if it is nothing else than their very essence itself, just as they have not more than one essence, but a single essence, so they have not more than one nature, but a single nature. For I here understand nature as identical with essence.
If, however, that through which these natures are so great is another than that which they are, then, certainly, they are less than that through which they are so great. For, whatever is great through something else is less than that through which it is great. Therefore, they are not so great that there is nothing else greater than they.
But if, neither through what they are nor through anything other than themselves, can there be more such natures than one, than which nothing else shall be more excellent, then in no wise can there be more than one nature of this kind. We conclude, then, that there is some nature which is one and single, and which is so superior to others that it is inferior to none. But that which is such is the greatest and best of all existing beings. Hence, there is a certain nature which is the highest of all existing beings. This, however, it cannot be, unless it is what it is through itself, and all existing beings are what they are through it.
For since, as our reasoning showed us not long since, that which exists through itself, and through which all other things exist, is the highest of all existing beings; either conversely, that which is the highest exists through itself, and all others through it; or, there will be more than one supreme being. But it is manifest that there cannot be more than one supreme being. There is, therefore, a certain Nature, or Substance, or Essence, which is through itself good and great, and through itself is what it is; and through which exists whatever is truly good, or great, or has any existence at all; and which is the supreme good being, the supreme great being, being or subsisting as supreme, that is, the highest of all existing beings.
Chapter V.
Just as this Nature exists through itself, and other beings through it, so it derives existence from itself, and other beings from it.
SEEING, then, that the truth already discovered has been satisfactorily demonstrated, it is profitable to examine whether this Nature, and all things that have any existence, derive existence from no other source than it, just as they do not exist except through it.
But it is clear that one may say, that what derives existence from something exists through the same thing; and what exists through something also derives existence from it. For instance, what derives existence from matter, and exists through the artificer, may also be said to exist through matter, and to derive existence from the artificer, since it exists through both, and derives existence from both. That is, it is endowed with existence by both, although it exists through matter and from the artificer in another sense than that in which it exists through, and from, the artificer.
It follows, then, that just as all existing beings are what they are, through the supreme Nature, and as that Nature exists through itself, but other beings through another than themselves, so all existing beings derive existence from this supreme Nature. And therefore, this Nature derives existence from itself, but other beings from it.