The 3+1 symbolism is the alchemical formula to integrate the unconscious fourth (synchronicity) into the idea of time (past present future, where number is unconscious acausal order coming into consciousness:
“One becomes two, two becomes three, and out of the third comes the One as the fourth”.
As Jung notes, this process showed up mostly in dreams:
“The incomplete state of existence is, remarkably enough, expressed by a triadic system, and the complete (spiritual) state by a tetradic system. The relation between the incomplete and the complete state therefore corresponds to the ‘sesquitertian proportion’ of 3 : 4. This relation is known in Western alchemical tradition as the axiom of Maria. It also plays a not inconsiderable role in dream symbolism.”
“Jung used the axiom of Maria as a metaphor for the whole process of individuation. One is the original state of unconscious wholeness; two signifies the conflict between opposites; three points to a potential resolution; the third is the transcendent function; and the one as the fourth is a transformed state of consciousness, relatively whole and at peace”.
You both might enjoy von Franz’s Number and Time thesis https://sumitupforme.blog/jungian-psychology/number-and-time-by-marie-louise-von-franz/, which she rewrites in On Divination and Synchronicity https://occult.g8x2.ldn.idrivee2-23.com/Psychology/Marie-Louise%20von%20Franz%20-%20On%20Divination%20and%20Synchronicity.pdf or Psyche and Matter https://maypoleofwisdom.com/wp-content/uploads/2022/12/psyche-and-matter-marie-louise-von-franz-z-lib.org_.pdf
The 3+1 symbolism is the alchemical formula to integrate the unconscious fourth (synchronicity) into the idea of time (past present future, where number is unconscious acausal order coming into consciousness:
“One becomes two, two becomes three, and out of the third comes the One as the fourth”.
Maria Prophetessa, quoted by Jung (1944)
https://jungiancenter.org/jung-on-the-axiom-of-maria-prophetessa/
As Jung notes, this process showed up mostly in dreams:
“The incomplete state of existence is, remarkably enough, expressed by a triadic system, and the complete (spiritual) state by a tetradic system. The relation between the incomplete and the complete state therefore corresponds to the ‘sesquitertian proportion’ of 3 : 4. This relation is known in Western alchemical tradition as the axiom of Maria. It also plays a not inconsiderable role in dream symbolism.”
https://eternalisedofficial.com/2024/01/11/the-psychology-of-numbers/
“Jung used the axiom of Maria as a metaphor for the whole process of individuation. One is the original state of unconscious wholeness; two signifies the conflict between opposites; three points to a potential resolution; the third is the transcendent function; and the one as the fourth is a transformed state of consciousness, relatively whole and at peace”.