
One of my seven granddaughters — Charlotte, the three-year-old — cheerfully reminded me of this truth. As they say, out of the mouths of babes!
Through example and repetition, her mother — my daughter — is teaching her daughter a foundational lesson. One that most humans learn to their unending profit. But, oddly, without an explanation rooted in self-interest (We never explained it quite that way to our children).