> `The brain is ultimately just a muscle. Make it stronger by working it out.' I like the analogy that things are "muscles". It concisely captures various phe

> `The brain is ultimately just a muscle. Make it stronger by working it out.' I like the analogy that things are "muscles". It concisely captures various phenomena that I've observed: the brain is a muscle, willpower is a muscle, trust (in another person) is a muscle ...