confidence for the long and often hard road of life. These strengths largely depend on turning positive experiences into mental structure. Unfortunately, most positive experiences are wasted on the brain because it evolved a negativity bias to help our ancestors survive. It's like Velcro for bad experiences but Teflon for good ones. This causes over-reactivity, needless worries, depression, and interpersonal conflicts. It also hampers child-rearing, psychotherapy, mindfulness training, and addiction recovery.