From personal experience and readings a very interesting aspect of a powerful psychedelic experience is the strong urge that everyone you know should try it. "What if all the senators did LSD/MDMA together!"

Many popular religions spend a great deal of time/energy getting others to join.

I wonder if that desire to proselytize is endemic to all powerful religious/spiritual experiences, or if it's just excited delirium in the case of psychedelics.