When my brother William and I were growing up, children were to be seen and not heard. But now things are different. There is a lot more emphasis on what children themselves want to do. Still, Don and I believe in limits. (William doesn't--his kids are unruly!) How did I acquire confidence as a parent? From a book that's been my bible since the day Sally was born. Doctor Spock says parents should trust their own instincts. He says the natural care that kindly parents give children is a hundred times more valuable than their knowing how to pin a diaper just right. What a relief that was to Don and me.