For thousands of years, people have ingested psychedelic drugs in order to alter their consciousness. They report having profound experiences - many of which are life-changing. But is this just simple delusion? Can you really learn important truths while on drugs? I think it's a grave mistake to dismiss the possibility out of hand.

To help me answer, I'm joined by the World Wanderers: Ryan Ferguson and Amanda Kingsmith, who have traveled to more than 45 countries together. While in Peru, they both had an ayahuasca experience that they consider to be life-changing in a positive way.