" character strengths that matter so much to young people’s success are not innate; they don’t appear in us magically, as a result of good luck or good genes. And they are not simply a choice. They are rooted in brain chemistry, and they are molded, in measurable and predictable ways, by the environment in which children grow "

― Paul Tough , How Children Succeed: Grit, Curiosity, and the Hidden Power of Character