Yeah, it's really just about having full control of your thoughts. Here's an excerpt from Culudasa's The Mind Illuminated: "You enter Stage Ten with all the qu

Yeah, it's really just about having full control of your thoughts. Here's an excerpt from Culudasa's The Mind Illuminated: "You enter Stage Ten with all the qualities of śamatha: effortlessly stable attention, mindfulness, joy, tranquility, and equanimity. At first these qualities immediately fade after the meditation has ended. But as you continue to practice, they persist longer and longer between meditation sessions. Eventually they become the normal condition of the mind." As for the gamma wave correlation, my guess is that the adept meditator is actually taking in everything that goes on around them (due to powerful mindfulness). While the layman is probably just thinking about what they'll have for dinner as they navigate the world.