Intervention theory may blur the line between the extraterrestrial and the angelic. It leads us to the possibility that monotheism may be the religion of angels given as gift.
Perhaps Gods Justice decreed that man must die but Gods Mercy intervened.
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So now my question is this: how can we communicate with the angelic beings? What language do they use in the world of the spirit? And what about the teachings that come from those who claim to give voice to these speakers? Is there any one who is a valid speaker for the angels?
A challenging question. Perhaps we can turn to one of those claimed to be such a speaker for the angels for possible answers?
https://www.amazon.com/dp/087306769X/ref=pd_lpo_sbs_dp_ss_1/159-3751462-6767111?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=lpo-top-stripe-1&pf_rd_r=NM9R7T16A9G2147WGMJX&pf_rd_t=201&pf_rd_p=1944687722&pf_rd_i=1598264672Way of God by Moshe Chaim Luzzatto aka the Ramchal is a book written around 1740 and relevant insofar as it is both systematic logical and that because it's author is among those who claimed direct instruction from an angel.
Before Adam sinned, he was on a much higher level than contemporary man. In that state, man was on a very lofty level, fit for a high degree of eternal excellence. If he had not sinned, man would simply have been able to elevate and perfect himself, step by step.
He would then give birth to future generations while still in that state of excellence. Their number would be accurately determined by God's wisdom, depending on how those enjoying his good should best be perfected. All these future generation would have shared this good with Adam.
God had also determined and decreed that all these generations would have been born of Adam should exist on various determined levels. Some generations would be primary, while others would be secondary, like roots and branches. Later generations would stem from the earlier ones [and share their characteristics], like branches stemming from a tree. The number of trees and branches, however, was determined from the very beginning with the utmost precision.
When Adam sinned, he fell from his original high level, and brought upon himself a great degree of darkness and insensitivity. Mankind in general also fell from its original height, and remained on a degraded level where it was not at all worthy of the eternal high degree of excellence originally destined for it.
The RaMCHaL also writes chapters on theurgy, inspiration, prophecy, and prayer as ways we can communicate with angelic beings, however, the writing here is probably the most difficult part of the book to comprehend.