The collective unconscious-so far as we can say anything about it at all-appears to consist of mythological motifs or primordial images, for which reason the myths of all nations are its real exponents.
In fact, the whole of mythology could be taken as a sort of projection of the collective unconscious. . . .
We can therefore study the collective unconscious in two ways, either in mythology or in the analysis of the individual.
The Structure of the Psyche
Collected Works 8