Archetype as Formal A Priori

The single most persistent Jungian clarification about the collective unconscious is that what is inherited is form, not content. “Archetypes are not determined as regards their content, but only as regards their form and then only to a very limited degree. A primordial image is determined as to its content only when it has become conscious and is therefore filled out with the material of conscious experience” (Jung, CW 9i §155).

“The archetype in itself is empty and purely formal, nothing but a facultas praeformandi, a possibility of representation which is given a priori. The representations themselves are not inherited, only the forms, and in that respect they correspond in every way to the instincts, which are also determined in form only.” (Jung, CW 9i §155)

Jung reached for the crystal-lattice analogy repeatedly. In his letter to Pastor Frischknecht (8 February 1946) he writes: “This lattice represents the axial system of the crystal. In the mother liquor it is invisible, as though not present, and yet it is present since first the ions aggregate round the (ideal) axial points of intersection, and then the molecules. There is only the one crystal lattice for millions of crystals of the same chemical composition” (Jung, Letters I). The analogy defends the hypothesis against the charge of Lamarckian inheritance of acquired ideas — a charge Jung regarded as absurd. “It should on no account be imagined that there are such things as inherited ideas. Of that there can be no question. There are, however, innate possibilities of ideas, a priori conditions for fantasy-production, which are somewhat similar to the Kantian categories” (CW 10 §14).

The distinction matters because it is the axis on which the entire concept of the collective unconscious turns. Without it, Jung’s hypothesis collapses into either naïve biologism or occult transmission. With it, the hypothesis becomes an empirical claim about the a priori structure of psychic experience — analogous, Jung explicitly says, to Kant’s categories of perception and to the inherited patterns of animal instinct. The archetypal image is thus always a hybrid: archetypal form filled by the individual’s biographical, cultural, and historical content.

Relationships

Primary sources

the-archetypes-and-the-collective-unconscious (Jung, CW 9i §155)
jung-psychological-types (Jung, CW 6 §§624–625)
the-undiscovered-self (Jung, CW 18 §§523–524)