The Zohar tells us that the moon “renounced her place of higher rank” – that of equality with the sun – and that “from that time she has had no light of her own, but derives her light from the sun. Nevertheless, her real light is greater than that which she radiates here below.”

Here below, therefore, the moon reflects the light of the sun, whilst above – where her name is ELOHIM – “her power is manifest in all directions…EL being ‘the dominion of the day’, IM being ‘the dominion of the night and HE in the middle being the remainder of the forces (‘the stars), participating in both dominions.”

Now, the moon, in so far as she is the nocturnal luminary above, she shines with her own light, and it is the sun which reflects her. In other words, the moon is ‘solar’ above and ‘lunar here below, whilst the sun is ‘solar’ here below and ‘lunar’ above.

It is in this sense that EL, the radiant part of the moon’s name above, has the “dominion of the day”, ie, it is the visible sun – reflecting the invisible moon during the day. Similarly, the visible moon reflects the sun (become invisible) during the night. The spiritual moon is therefore the sun which shines at midnight. And it is the spiritual moon – or Isis – Sophia – that Apuleius “saw shining at midnight in its briliant radiance.” For the long vigil in the Isis temple resulted in a vision of the cosmic principle of Isis, ie, the spiritual moon or the “sun at midnight.”

All these things, although presented to us in mythological clothing, relate to the profound reality of the relationship of intelligence and wisdom, and their union – intuition. For intelligence corresponds to the moon, wisdom to the sun, and intuition to the restoration of the “intimate union” of the two luminaries.

Here below intelligence reflects wisdom – or, if it is eclipsed (see Letter XVIII, The Moon), it reflects the terrestrial world of external experience. But there is another intelligence above, a trancendental intelligence, whose “light is greater than that which it radiates here below”, and which – united intimately to wisdom – is “inscribed above among the letters of the sacred name (YHVH), which are four in number”, and which shines in the middle of the night “in its briliant radiance.”

This higher intelligence, this “sun at midnight”, which is the conjunction of the spiritual sun and spiritual moon – or, in other words, the intimate union of intelligence and wisdom – is the “star” of Hermeticism, and it is “The Sun” of the nineteenth Arcanum.

“The Sun” of the nineteenth Arcanum is the “sun at midnight”, ie, the sun that Apuleius “saw shining at midnight in its brilliant radiance,” and it is this “sun” which is the “star” of Hermeticism across the ages. It is the principle of intuition, or the intimate union of transcendental intelligence and wisdom.”

Unknown Author, Meditations on the Tarot, Letter XIX, The Sun