What is everyones opinion of the connection between psychedelic drugs and spirituality / religion?

After reading the Bhagavad Gita and Dhamapada and other texts I came to the conclusion that either some drugs make us more aware of our purpose and place in the world allowing us to perceive things we normally cannot, or these religions were developed directly from drug use. If anything the fact that in the Bhagavad Gita things are said that perfectly describe a mushroom or acid trip says SOMETHING (if only that drugs were possibly the foundation). Anyhow the relationship is interesting if anything. If you haven't read DMT: The Spirit Molecule by Dr. Rick Strassman, or Zig Zag Zen: Buddhism and Psychedelics by Allan Badiner and Alex Grey they are both an interesting read.

Also reading these ancient texts, I found that most of these "trips" were not discussed as drug trips, but as high level meditation.  Since I have never reached such a high level of meditation, I cannot personally say that the awareness gained is roughly equal to a drug trip or not, but that there may be a connection is interesting.

Bottom line: I am wondering what everyones rational response is to this: "Do you think that there is a connection between drugs and the formation of religion or that drugs can lead to a higher perception of the senses?"