For I cannot understand how, when separated from the other, each of them was one and not two, and now, when they are brought together, the mere juxtaposition of them can be the cause of their becoming two: nor can I understand how the division of one is the way to make two; for then a different cause would produce the same effect-as in the former instance the addition and juxtaposition of one to one was the cause of two, in this the separation and subtraction of one from the other would be the cause.
Nor am I any longer satisfied that I understand the reason why one or anything else either is generated or destroyed or is at all, but I have in my mind some confused notion of another method, and can never admit this.
Then I heard someone who had a book of Anaxagoras, as he said, out of which he read that mind was the disposer and cause of all, and I was quite delighted at the notion of this, which appeared admirable, and I said to myself: If mind is the disposer, mind will dispose all for the best, and put each particular in the best place; and I argued that if anyone desired to find out the cause of the generation or destruction or existence of anything, he must find out what state of being or suffering or doing was best for that thing, and therefore a man had only to consider the best for himself and others, and then he would also know the worse, for that the same science comprised both.
And I rejoiced to think that I had found in Anaxagoras a teacher of the causes of existence such as I desired, and I imagined that he would tell me first whether the earth is flat or round; and then he would further explain the cause and the necessity of this, and would teach me the nature of the best and show that this was best; and if he said that the earth was in the centre, he would explain that this position was the best, and I should be satisfied if this were shown to me, and not want any other sort of cause.
And I thought that I would then go and ask him about the sun and moon and stars, and that he would explain to me their comparative swiftness, and their returnings and various states, and how their several affections, active and passive, were all for the best.
For I could not imagine that when he spoke of mind as the disposer of them, he would give any other account of their being as they are, except that this was best; and I thought when he had explained to me in detail the cause of each and the cause of all, he would go on to explain to me what was best for each and what was best for all.
I had hopes which I would not have sold for much, and I seized the books and read them as fast as I could in my eagerness to know the better and the worse.
What hopes I had formed, and how grievously was I disappointed!
As I proceeded, I found my philosopher altogether forsaking mind or any other principle of order, but having recourse to air, and ether, and water, and other eccentricities.
Pronoia — the doctrine that the divine actively orders the unfolding of the cosmos and human affairs toward intelligible ends, against pure chance or blind necessity.
The passage explicitly argues that mind is the disposer of all things and puts each particular in the best place.