True, your original post was this:
But that doesn't tell me what volume of Patrologia Graeca it's in or what page. To find it based on that, one has to open up all of the volumes that have Athanasius's writings and scan through the table of contents of each one until you find something that looks similar (remember, the table of contents are in Latin, not English, so one can't just look for the same name, but look for Latin with the same meaning).
However, as it turns out, the citation you are referring to is not actually from one of the Athanasius volumes. I did a search for your quote to see if maybe someone else had posted it, as I suspected you had copied it from someplace else. Which seems to have been the case, as I did find it at a few places, like
https://classicalchristianity.com/2012/10/26/st-athanasius-on-icons/ which told me "39th Question to Antiochos, PG 94.1365".
So it tells us, helpfully, that it's in volume 94, column 1365. Anyone can look at it for themselves at
Patrologiae cursus completus ; omnium SS patrum, doctorum scriptorumque ecclesiasticorum : Migne, J.-P. (Jacques-Paul), 1800-1875 : Free Download, Borrow, and Streaming : Internet Archive. Note that the way it works is you have the Greek original and Latin translation parallel, which is good for me because I know basically no Greek but do know a little Latin. But we observe something odd here: That volume has works of John Damascus. So what gives? Well, what's happening is that John is offering a
quote from Athanasius, attributing it to the source given, though Damascus actually writes it's the 38th Question (it's mentioned in a footnote that it's actually the 39th question in the text we have).
However, here is where we run into big problems with the quotation. Migne--the compiler of Patrologia Graeca--says something very critical in the footnote that seems to have been missed by whoever was the original source for this citation. Migne says, based on the usage of "Ubi proinde signficatur quaestiones istas non esse inagni Athanasii, sed recentioris, qui sane vixit saeculo VIII, vel octavo" which roughly means "Hence it is signified these questions are not those of Athanasius, but of someone more recent, from the eighth century". In other words, this is not an actual quote of Athanasius, but someone else entirely centuries later that John of Damascus seems to have incorrectly thought was Athanasius. Indeed, if we look into the volumes earlier, the work being quoted is in Volume 28 (one can see the applicable portion of the work at
Patrologiae cursus completus ; omnium SS patrum, doctorum scriptorumque ecclesiasticorum : Migne, J.-P. (Jacques-Paul), 1800-1875 : Free Download, Borrow, and Streaming : Internet Archive), but the work in question listed under "Spuria", meaning Spurious, a term used to refer to works that have been attributed to a particular author but were not their work. In other words, it is not regarded as actually being written by Athanasius of the fourth century.
To be fair, Patrologia Graeca was published in the mid 19th century, and as scholarship has improved, some works previously thought spurious are now thought to be true, and vice versa. So perhaps, while Migne regarded it as spurious, things have changed. But unless scholarship can be demonstrated to have changed in the meantime, it appears that this quote is not from Athanasius at all--and certainly, the source identified as evidence (Patrologia Graeca) denies it was him.
So this one seems a false quote.
