For anyone that has ever doubted meditation’s ability to bust stress and boost brain power, it’s time to reconsider. Functional Magnetic Resonance Imaging (FMRI) is now proving what Buddhist monks have known all along: meditation works. Indeed, FMRIs are revealing that meditators not only cut stress and boost concentration while meditating, but also fundamentally alter the structure of their brains, increasing areas related to higher level thinking and muting the fight or flight messages sent by the amygdala in stressful situations. Those who practice 40,000 hours or more alter their brains so fundamentally that their normal brain state mimics those in deep meditation: a state of being known as Zen. Want to become a Zen master?