Jung is drawing a boundary here that he will defend his entire life: the archetype is a structural fact, not a metaphysical claim. The crystal lattice does not generate the crystal out of pure spirit; it is the constraint that makes crystallization possible at all. Jung wants the archetype understood in exactly that key — not as an idea waiting to become real, but as a formal condition already at work in whatever is becoming.

The Platonic inheritance is the pressure he is writing against. When Augustine speaks of "archetypal light" he still means something prior to matter, more real than the instance, existing in the mind of God. That is hypostasis — the move of granting ontological priority to the form, lifting it out of the empirical world into a realm that underwrites it. Jung refuses the move, not because the forms are unreal but because the refusal is what keeps psychology from becoming theology. The archetype is known only in its effects: in image, in behavior, in the repeating grammar of the dream. Posit it above experience and you have left the empirical ground on which any claim about it could be confirmed or complicated.

This is the tension that runs through every spiritual use of Jung's vocabulary. The "Self" elevated to a guiding divinity, individuation recast as ascent — each borrows the structural language and quietly reintroduces the hypostasis Jung spent that boundary refusing.