Most of us arrive in our fifties feeling that the cage has gotten smaller. What’s actually shrunk is our mindset. We’re in a prison of our own making… - Steven Kotler

All no means is they don’t know for sure or there’s a secret being kept, like someone’s trying to hide something really good.

In fact, we’re not smart and we have bodies — we’re smart because we have bodies.7 The heart has about 40,000 neurons that play a central role in shaping emotion, perception, and decision making. The stomach and intestines complete this network, containing more than 500 million nerve cells, 100 million neurons, 30 different neurotransmitters, and 90 percent of the body’s supply of serotonin (one of the major neurochemicals responsible for mood and well-being). This “second brain,” as scientists have dubbed it, lends some empirical support to the persistent notion of gut instinct.

This is another reason why flow states significantly enhance performance: when the “self” disappears, it takes many of our limits along for the ride.