The term 'psi' is in English used to refer on the one hand to paranormal phenomena or faculties and the therefrom issuing psychic forces and on the other hand to the Greek character 'Ψ', in Greek known as 'psei'.1
This 'Ψ' has the shape of a trident and symbolizes triplicity or a trinity (being a triplicity as a unit). The figure of the trident as resembled by the character 'Ψ' can also be seen to consist of the numeral '3' being turned over and placed on top of the numeral '1'.Now the trident as an instrument or a weapon is being wielded by the Greek mythological god Poseidon and his Roman equivalent Neptune.2 The name 'Poseidon' is in the ageless wisdom considered to stem from the (translated) name of the last sunken island of Atlantis, being 'Poseidonis'. This island sank away about fifteen thousand years ago where now the Azures are.3, 4
Now the name of that island can be read as 'Posei-donis'. And with 'donis' in line with 'Adonis' etymologically understood as 'lord',5 and 'Posei' being a clear phonetic equivalent of 'psi' (or in Greek 'psei') in which the 'o' is swallowed, may Poseidon be understood as lord of psi.
That the name 'Poseidon' can be traced back to the last sinking island of Atlantis also sets the regarded god as a personification of the Atlantean race.6 Now this race developed the human faculty of emotion and its corresponding astral magic or lower psychism,7, 8 and to this the at the start mentioned English definition of psi corresponds. It is also the case that emotion is elementally symbolized by water,9 and thus Poseidon, the lord of psi, wielding the trident of psi, rules over the waters.
Now 'Neptune' is not only the name of the Roman mythological equivalent of the Greek Poseidon. It is also the name of the planet that esoterically corresponds to devotion and emotion.10 And therewith the interrelating lines between psi, Poseidon, the Atlantean race, water, emotion and lower psychism are thus strengthened.
These lines are even more strengthened when we see that the astrological sign for Neptune consists of a trident with a horizontal line at the bottom forming a lower cross with the longer or bottom vertical line: ♆.
This monogram of Neptune, which is indirectly also the monogram of Poseidon, is reminiscent of the earlier contemplated Christian chi-rho or Χ-Ρ monogram: ☧.11 This monogram was found to refer to Christ whereby the ellipse of Ρ represents spirit and the Χ the cross of matter. The Χ-Ρ monogram thus symbolizes the descent of spirit into matter, which then form the intermediate Christ-principle of consciousness.12
Now when this line of thought is extended to the symbol of Neptune and Poseidon we discover it to be a Ψ-Χ monogram. But 'Ψ-Χ' reads as 'psi-chi', reads as 'psyche', and the psyche then comes to be understood as the descent of psi into matter.
Written with a capital 'Psyche' is also the name of a Greek and Roman mythological young lady that fell in love with the god Eros or Cupid.13 She is often depicted as a young lady with butterfly wings.14 This is of significance because the butterfly is an old symbol of the soul or the consciousness principle.15 Psyche being depicted as a lady with butterfly wings then comes to symbolize the soul as incarnated in a human form, comes to symbolize the consciousness principle clothed in matter.
The butterfly in a lady as a symbol of psi in physical man still corresponds with the way the same is symbolized by the trident being wielded by a lord. However where the trident is rather a symbol of water there is the butterfly rather a symbol of air. This is acknowledged by the Greek 'psyché' carrying the meaning of 'breath'.16 And air is the elemental symbol of the plane of intuition.17 So where the trident of Poseidon relates psi to emotion there relates the butterfly of Psyche psi to intuition.
This seems contradictory because emotion is a faculty of the personality or the lower man while intuition is a faculty of the soul or the higher man.18 But this seeming contradiction can be reconciled when psi is considered as the dual principle relating emotion to intuition. And this makes sense. For in the process of human evolution the emotions of the solar plexus and the personality have to be transformed into the intuition of the heart and the soul.19 And this process is dual. For on the one side the emotions have to be made receptive for the inflow of the intuition, and on the other side the intuition must be poured into the emotions. Poseidon represents the first on a racial scale and Psyche represents the latter on an individual scale.
Psi, thus we may conclude, regards in essence the transformation of emotion into intuition.