Delta-frequency brain waves usually come during deep, restorative sleep. However, over the last four years my research team and I have recorded several students who can move into very deep delta brain waves during meditation. Their bodies are deeply asleep, and they are not dreaming, but their brain scans show that their brains are processing very high amplitudes of energy. As a result, they report having profound mystical experiences of oneness, feeling connected to everyone and everything in the universe.
