I will apologize to and beg leave of sdi as a host for too many comments (and comments-to-myself, to boot), but the larger theme here, of congruence between similarity, likely bears on the ideas of emanation from The One (and the gods) and the idea of "participation," which is not explicitly mentioned (I think) by Sallustius, but is relevant background.

To your point above about the relationship between the inner and outer aspects: yes, but in particular I would suggest it has to do with the gods, at the highest level of ontological reality (barring The One, which is not accessible to us), and their attributes "trickling down," as it were, through all the other layers (including this last one, the material plane). Perhaps not unlike object-oriented programming, in a crude sense, but I digress.

Thus, a given object manifest here on the material plane bears certain spiritual resonances with the gods dwelling "upstream" of it on a higher plane.