I hope everyone will indulge me in a bit of theological illustration. I just broke from a three-day fever, and as I was lying awake in bed an image occurred to me that might help illustrate what the Latin filioque is really trying to say. It’s possibly just fevered non-sense, but I think it’s sound.
Imagine a string of three balls hanging from the ceiling, one on top of the other. Considering only the balls, the top ball is the “first cause” of all the balls hanging; all “hanging” ultimately goes back to this top ball as the source and reason for it occurring at all. We can’t say that the second ball is the “first cause”, or source, of the third ball’s hanging because it receives its power to hold up the third ball from the first ball; if the first ball didn’t hang, and pass that power on to the second in some manner, then the second ball wouldn’t have the power to hold up the third, AND it wouldn’t be hanging itself.
Now the third ball, despite having two balls prior to it that are in some way holding it up, is not hanging by two separate “hanging powers”, but only by one. There is one “hanging” of the third ball, one “principle” of it being held up. If the first two balls were side by side and together holding up the third in a kind of upside-down triangle, then we would say that there are two principles of hanging, the first and the second balls’ powers of hanging.
Now some might suggest that in this case the hanging of the third ball is not immediately connected to the first, since the second ball is between them. That’s an obvious assumption to make, but it’s incorrect; the one hanging power of the first ball immediately touches each ball beneath it. In other words, by one single and immediate “hanging power”, the first ball holds up two balls, not just one; there are not two “hangings” coming from the first ball, but only one that holds both up. Remove this one hanging power and both balls immediately fall.
It is actually the second ball whose “hanging power” is not immediate, but rather mediate. Despite it being directly connected to the third ball, it doesn’t have the “hanging power” in and of itself, and must first receive it from the first ball. In a very real sense, then, the first ball immediately holds up the second and the third, while the second ball mediately holds up the third; the first ball’s hanging power is not impeded by “passing through” the second, but rather is immediate precisely
because of the second.
In other words, we can say that the one hanging power of the first ball is the immediate cause of the other two being held up, but we can’t say that the second ball’s hanging power is the immediate cause of the third ball hanging up, since it must receives this power from the first ball first, before it can hang up the second.
Another important element of this illustration is that it removes any erroneous concept of time from the equation; the three balls hang together all at once. The designation of “first”, “second”, and “third” have to do with causal sequence, not time sequence.
So we could easily say, in answer to “what holds up the third ball”, “the first and second ball hold up the third” (this would be the equivalent of the Latin filioque, since the Latin word says nothing about source at all). We could also say equally well that the first ball holds up the third ball “through” the second, without removing its immediacy since “through” is describing a property of the one, immediate hanging, not something that alters it. We could not say, however, that the second ball is the source of the third ball hanging (and since the Greek term used for procession in the Creed means “from the source”, a term not found in Latin, the expression “and the Son” can’t be added to the Greek Creed without heresy).
I hope that illustration helps! Any thoughts or questions?
Peace and God bless!