If an angel appears before you in human form, they come bearing good news. If they appear before you in their true form, they come bearing responsibility.
In my experience, if they appear before you in human form, it will cost you a few hundo to fuck it. If they appear in the other form, then if you offer it some of whatever you just took, it will fuck you for free.
Angels came to Lot in human form. They told him to GTFO of the city. Things happen, and his wife ends up a pillar of salt.
This is also when a crowd gathered up outside his house wanting to rape his guests, and Lot's response was to offer his daughters to be raped instead. This demonstrates that Lot showed proper hospitality to his guests, or something.
A failure state the human brain goes into. Like how certain optical illusions work on nearly everyone
Humans build narratives off senses. If there is already a cultural narrative and you have weird data will put it in there. You got a round peg and your culture gave you a round hole.
A physical chemical allows you to outwit infinitely powerful infinitely higher beings and they are powerless to stop it.
This is a good angel to support the theory that angels are actually misunderstood four-spatial-dimensional beings who survived the universe collapsing to three spatial dimensions.
Bible: Angels visit earth and have consensual relations with human women. Angels also visit Abe and Sarah appearing to be humans. Angels visit Lot and appear to be human.
Also Bible: be not afraid of me despite being a lovecraftian nightmare!
It helps to be tripping absolute balls on mushrooms, peyote, or other hallucinogens. Well "helps" in the sense that while the angel will seem normal, ordinary rocks will now terrify you.
Always makes me laugh when at kids nativities they have a sweet little girl in a white dress saying meekly "Don't be afraid". Tough shepherds would take a LOT to freak out!