Hot, cold, and just right …

… Bryan Appleyard — Marshmallow Wisdom. (Hat tip, Dave Lull.)

 The old belief that our destinies were more or less fixed at birth or soon after has been replaced by a more flexible and consoling view. Our genes do not control our lives, rather they react in response to the environment. Similarly, our mental structures are not immutable; they can, with care, be re-engineered. As a result, Mischel says, the nature-nurture argument has become meaningless.