For purely psychological reasons I have, in other of my writings, tried to equate the masculine consciousness with the concept of Logos and the feminine with that of Eros. By logos I meant discrimination, judgement, insight, and by Eros I meant the capacity to relate. I regarded both concepts as intuitive ideas which cannot be defined accurately or exhaustively. From the scientific point of view this is regrettable, but from a practical one, it has value, since the two concepts mark out a field of experience which it is equally difficult to define. (Carl Jung, CW 14, paragraph 224)

“Although the renewed king corresponds to a renewed consciousness, this consciousness is as different from its former state as the filius regius differs from the enfeebled old king. Just as the old king must forgo his power and make way for the little upstart ego, so the ego, when the renewed king returns, must step into the background. It still remains the sine qua non of consciousness, but it no longer imagines that it can settle everything and do everything by the force of its will. It no longer asserts that where there’s a will there’s a way. When lucky ideas come to it, it does not take credit for them, but begins to realize how dangerously close it had been to an inflation. The scope of its willing and doing become commensurate with reality . . .” (Jung, CW 14, par 522)

Consciousness requires as its necessary counterpart a dark, latent non-manifest side, the unconscious, whose presence can be known only by the light of consciousness. Just as the day-star rises out of the nocturnal sea, so, ontogenetically and phylogenetically, consciousness is born of unconsciousness and sinks back every night to this primal condition. This duality of our psychic life is the prototype and archetype of the Sol-Luna symbolism. So much did the alchemist sense the duality of his unconscious assumptions that, in the face of all astronomical evidence, he equipped the sun with a shadow. (Jung, CW 14 par 117)