Below is a little quote from Rudolf Steiner with regard to lunar eclipses. I’ve replaced his words with “subconscious” below, because it’s a more grounded and current interpretation in my view.
“When there is an eclipse of the moon, the man of today merely says: ‘Now the earth comes between the sun and the moon; hence we see the shadow cast upon the moon by the earth.’ That is the physical explanation. But in this case also the old initiate knew that a spiritual reality was behind the physical fact.
He knew that when there is an eclipse of the moon, thoughts stream through darkness down upon the earth; and that such thoughts have a closer relationship with the subconscious life than with the conscious life of the human being. The old initiates often made use of a certain simile when speaking to their pupils.
It is, of course, necessary to translate their words into modern language, but this is the gist of what they said: ‘Visionaries and dreamers love to go for rambles by moonlight, when the moon is full. There are, however, certain people who have no wish to receive the good thoughts coming to them from the cosmos, but who, on the contrary, are desirous of getting hold of ‘the subconscious’ (my current interpretation). Such people will choose the moment of a lunar eclipse for their nocturnal wanderings…
Eclipses of the sun and the moon, recurring as they do in the course of every year, may really be looked upon as “safety-valves.”… The lunar eclipse exists for the purpose of allowing the ‘subconscious’ thoughts, which are present in the cosmos, to approach those human beings who are desirous of ‘being aware’ of them. People do not, as a rule, act in full consciousness.’”