In one sense it’s not hard to quiet your default mode network: just do something that requires concentration. Do a crossword puzzle or try to juggle three tennis balls. Until you get to a point where juggling is second nature, you probably won’t be fantasizing about the attractive person in the cubicle next to yours. What’s hard is to abandon the default mode network when you’re not doing much of anything—like, say, when you’re sitting in a meditation hall with your eyes closed. That’s why you try to focus on the breath: the mind needs some object of focus to wean it from its habitual
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