It's the birthday of psychologist Erik Erikson, born in Frankfurt, Germany (1902). He argued that the human life cycle could be understood as a series of eight developmental stages. He said each stage has its own "crisis" that must be overcome before moving on to the next stage. For adolescents, the crisis is figuring out who you are and what you want to do with your life—and that's where the term "identity crisis" comes from.

Erikson said, "There is, in every child, at every moment, a miracle unfolding."