"different brain states"

Clearly the brain is capable of experiencing more than 1 state - otherwise all experience would be completely uniform

I don't believe that there is something supernatural to which our brains might be attuned

Can we, by meditation or drugs, induce a dream-like state while waking? Probably. Is it beneficial to do so? I am quite doubtful.

I think much human foolishness comes from stimulating a natural and healthy mechanism outside of its evolved context. For example, homosexuality stimulates reproductive urges (and the attendant pleasure) outside of the reproductive context.