Whether all the angels know what one speaks to another?

Objections

Objection 1 : It would seem that all the angels know what one speaks to another. For unequal local distance is the reason why all men do not know what one man says to another. But in the angelic speech local distance has no effect, as above explained (Article [4]). Therefore all the angels know what one speaks to another.
Objection 2 : Further, all the angels have the intellectual power in common. So if the mental concept of one ordered to another is known by one, it is for the same reason known by all.
Objection 3 : Further, enlightenment is a kind of speech. But the enlightenment of one angel by another extends to all the angels, because, as Dionysius says (Coel. Hier. xv): "Each one of the heavenly beings communicates what he learns to the others." Therefore the speech of one angel to another extends to all.