The Seba library treats 4 in 6 passages, across 2 authors (including von Franz, Marie-Louise, Jung, Carl Gustav).
Alchemical speculations led to the idea of four states of aggregation, to the model of a space-time quaternion of four dimensions, and finally to different modern quaternarian models of the subatomic world.
Von Franz argues that the number four functions as a recurring structural principle linking alchemical cosmology, Jungian quaternity symbolism, and modern physics.
, Psyche and Matter, 2014thesis
The vision of the 'world clock' is neither the last nor the highest point in the development of the symbols of the objective psyche. But it brings to an end the first third of the material, consisting in all of some four hundred dreams and visions.
Jung uses the four-hundred-dream series as a structural boundary within his empirical documentation of the Self's symbolic development, implicitly marking quadratic completeness.
, Psychology and Alchemy, 1944supporting
take a fourth part of it, i. e., one part of the ferment and three parts of the imperfect body
The alchemical prescription cited by Jung employs the ratio of one to three (implicit fourfoldness) as the operative formula for transformation, grounding the quaternity in practical Hermetic procedure.
, Psychology and Alchemy, 1944supporting
dragon, 23, 134, 235, 291ff, 358, 372, 464f, figs. 46, 47, 73, 118, 187, 189, 196, 199 four-headed, 285
The index entry for the four-headed dragon in *Psychology and Alchemy* signals Jung's systematic cataloguing of quaternary animal symbolism within alchemical imagery.
, Psychology and Alchemy, 1944supporting
First and foremost, it establishes the fact that something is there. I call this faculty sensation … A third faculty establishes the value of the object.
Jung's enumeration of the four psychological functions implicitly depends on the number four as the exhaustive and complete set of modes of conscious orientation.
, The Structure and Dynamics of the Psyche, 1960supporting
number belonging to the Son, measure to the Father and weight to the Holy Spirit. The unus mundus is thought of as an infinite sphere, like God Himself.
Von Franz notes that the Trinitarian mathematical order underlying the *unus mundus* concept implicitly gestures toward a fourth element needed for completeness, contextualizing Jung's move from three to four.
, Psyche and Matter, 2014aside