They didn't seem malevolent and he just assumed they were from God.
The Bible warned us explicitly NOT to communicate with anything from the spirit realm unless we are absolutely certain that it is from God. No necromancy, no seances, no praying to dead parents, no participation in occult activity, no praying to idols, no use of witches or seers, etc., etc., etc. The reason for this, as you know, is that it opens a portal to the demonic.
This was the leap of faith that Chris took.
In his book, UFO of God, he is in constant prayer (i.e., communication) with these orbs and The Lady. He never invokes the Name of Jesus. Ever!
Chris made a naive assumption ... But he never tested them by using any Biblical discernment or demanding that they prove their provenance vis-a-vis God and the Name of Jesus.
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It is your assumption that he made an assumption. Which you classify as naive. Is it?
Demanding that a experience believed from God show proof of the same - is beyond idiotic.
There is no denying the simultaneous correspondence between the EEG and the actual phenomenon - which you never watched since it was in the 2nd half of the episode.
Why is it necessary to invoke the name of Jesus? Millions of people in the Christian faith do not always invoke Jesus - many invoke the Lady (Mary).