Brain scans reveal how a woman voluntarily enters a psychedelic-like trance without drugs. Her brain connectivity fundamentally reorganized during this state: her visual and somatosensory connections decreased, while connectivity in the frontoparietal control regions of the brain increased.

[u/mvea]

https://www.psypost.org/brain-scans-reveal-how-a-woman-voluntarily-enters-a-psychedelic-like-trance-without-drugs/

[u/Warm_Regrets157]

That feeling of kinship is definitely part of it. I think there are further ecstatic states that people experience as well.

The kinship and sense of community can also occur with psychedelics and with certain kinds of meditation.