i was recently started to find in my reading that the compound DMT (being Di-methyl-triptamine, not the other compound NN-DMt) is produced by the pineal gland naturally, throughout our entire lives, and also that the brain accepts DMT (whereas it rejects or fights most psychedelics, such as LSD or Psysolin/psilyciben). this "indigeonus DMT" is present in every human for "some reason"- one that has yet to be determined-.
it has been suggested that this indigeonus DMT is released nly during Birth, Near Death, and more skeptically accidental releases of this DMT could be the cause(or could be mistaken for) alien abductions...(during studies the volanteers often decribed "others" were present or that "they came in contact with other beings, not human, not even nessesarily from this dimension". also, near death experiances could trigger accidental raeleases of this DMT, which could be responsable for the "warm, white light at the end of a tunnel (see next paragraph). there is one other instance where this DMT could accidentally be released...and that is the highest forms of meditation, though i am a bit skeptical about that one.
there is also the religious question, along with meeting other beings, research subjects often could feel "warmth and love everywhere", "the presance of God", "hear god's voice", and nearly every subject saw a "white light" and could "...feel the source of all power in the universe...".
i do not know much about neurology, though i am learning, and i am looking for opinions from chemists on why they think DMT is present, and accepted by our brain. could it be that this chemical compound is responsable for your unique consiousness?
*ref: DMT: the Spirit Molecule by Rick Strassman, MD.