I can hear you asking, "What's the point of this letter, Dad?" Maybe the letter is just an experiment in time travel, an opportunity for you to reach back across the decades to know your father's heart and mind at a specific moment during your childhood. Or maybe it's about our collective identity: Who am I with you? Who am I apart from you? If I get lucky and die at a reasonable old age, you will be approximately the same age I am now when you finally read this. I like the symmetry of that possibility, especially if you have children, and you're in the throes of trying to be a not-so-terrible parent yourself.