Yes, your brain is an organ. But it acts like a muscle. And it most significantly resembles a muscle in that it’s a use-it-or-lose-it device. Our brains stay fit only when we make a concerted effort to keep them fit. If we fail to keep our brains in shape—either through laziness or being overly dependent on technology to do our thinking for us or by failing to challenge ourselves with new learning—it becomes “flabby.”
