Babies and young children are like the research and development division of the human species, and we grown-ups are production and marketing.

Because we imagine, we can have invention and technology. It's actually play, not necessity, that is the mother of invention.

Becoming an adult means leaving the world of your parents and starting to make your way toward the future that you will share with your peers.

One of the most distinctive evolutionary features of human beings is our unusually long, protected childhood.

Ineffective or weak brain connections are pruned in much the same way a gardener would prune a tree or bush, giving the plant a desired shape.

To support the people we care about is intrinsic, it is not instrumental. It's not something we do because we're hoping to get some other outcome.

Some people say that parents don't matter, and that's not true at all. The irony is that we pay attention to all these things that don't matter, and not to what does matter, such as parents having enough resources to provide an environment where their children have both security and freedom.