Graham Hancock gives his perspective on psychedelics like DMT, ayahuasca, san pedro and marijuana and how they have been used since ancient times to connect with the divine/spirit. He also talks about ancient sites and civilizations, the paradoxes they bring to the forefront. There is an interesting question and answer session towards the end.
Similarities between Tesla’s outlook on the universe and Vedic cosmology
BRAHMAN = THE ABSOLUTE
MAHAT OR ISHVARA = PRIMAL CREATIVE ENERGY
PRANA and AKASHA = ENERGY and MATTER