“[...] Many people put off doing what they love, or what they know they need to do for themselves, until later in life, trying to get the world's demands out of the way first. What a grave mistake! [...]” Doing What You LoveA Users Guide To The BrainJohn J Ratey Book:A User's Guide to the Brain: Perception, Attention, and the Four Theaters of the Brain Source: A User's Guide to the Brain: Perception, Attention, and the Four Theaters of the Brain