Proposition Thirty-Five: Every Effect Both Remains in its Cause, and Proceeds From it, and Reverts Upon It
Proclus attempts to establish this key Neoplatonic doctrine by eliminating all other options. There are six. All six start with assumed premises and derive absurdities. First let us consider what occurs if something only remains. As Proclus says, “For if it were simply to remain, it will in no way differ from its cause, being without distinction from it; for distinction arises simultaneously with procession.” Informally, the argument is that when we assume only that effects remain in their causes, we destroy any difference between the two. This is insane. I construct his argument as such:
AP: Effects only remain in their cause.
1). Distinction between cause and effect arises only with procession.
2). In remaining, there is no procession.
C: With this AP, there will be no distinction between cause and effect, which is absurd.
Next, let us assume that effects only proceed from their cause. Proclus says, “And if it should proceed only, it will be devoid of conjunction or sympathy with its cause, since it will have no means of communication with it.” I think that the argument here is similar to the ones found in Scholastic thinkers. Assuming that an effect only proceeds, and has no similarity with its cause, will make the effect unintelligible. In the context of Proclus’s elements, Proclus doesn’t give us much to go on here so my reconstruction is:
AP: Effects only proceed from their cause.
1). Effects have no similarities with their causes.
2). This is a violation of the principle of proportionate causality and Proposition 7.
C: This is absurd, and causes must at least have some sort of remaining in their cause.
Thirdly, let’s assume that effects only revert to their causes. Proclus states, “And if it should revert only, how can that which does not derive its being from its cause revert in its being upon a principle that is alien to it?” I take this to be saying that it simply makes no sense to have an effect revert upon its cause because without remaining and proceeding, there wouldn’t be a cause at all.
AP: Effects only revert upon their cause.
1). Without remaining or proceeding, there would be no cause in the first place.
2). To revert upon a cause requires a cause.
3). So there a requirement for a cause and not for one.
C: This is a logical contradiction.
Next, Proclus combines all of these and eliminates three more options. He starts with an effect remaining and proceeding, but not reverting. He says, “And if it should remain and proceed, but does not revert, how does it come about that each thing has a natural desire in the direction of its well-being and the Good, and an upward striving towards its generative cause?” This is where things start to get more complex and it is necessary to understand the Platonic, Aristotelian, and Neoplatonic conception of the Good, and why things strive toward it. That will be covered elsewhere, so just assume that it is the case. Proclus is saying that if things simply remain in, and proceed from their cause, then it does not make sense as to why they strive for the good.
AP: Things remain in and proceed from their cause.
1). All things strive for the Good and toward their generative cause.
2). This tendency is not a remaining or a proceeding.
C: We must say that all things also revert, and not just remain and proceed.
Next, he tackles the assumption that things only proceed and revert, but do not remain. Proclus says, “And if it should proceed and revert, but not remain, how does it come about that after being parted from its cause it strives to be conjoined with it, although before being separated there was no conjunction? For if it was conjoined with the cause, it certainly remained in it.” Not only do we encounter the original difficulties here, but they are compounded. He seems to be saying that there is a procession, and a striving toward the cause, but nothing at all in common between them. But this can’t be the case, for when the effect is reverting, it is striving for the aspect of the cause that remains in it.
AP: Things only proceed and revert to their cause.
1). Without remaining in their cause, things would not have anything to strive toward.
2). Yet, they do strive toward their cause.
C: They must then remain in them and the AP must be rejected.
Finally, Proclus assumes that things remain and revert. He says, “Finally, if it should remain and revert, but not proceed, how can something revert that has not undergone distinction, since all reversion, after all, resembles resolution into that source from which it has been divided according to being?” The idea here, I think, is simple. If a thing is said to remain and revert to its cause, it must be different than its cause. Yet without procession this is impossible, so the assumption is absurd.
AP: Things only remain and revert to their cause.
1). In reverting to their cause, they must be distinct from their cause.
2). A distinction requires procession.
3). There is no procession here.
4). There can be no distinction and thus no reversion.
C: This is a contradiction which is absurd.
The only option left is to conclude that all effects must remain in, proceed from, and revert to their causes. With this, Proclus establishes the common-sense conclusion through the process of elimination.