I was born at age 89, with the same knowledge as any baby (none)—although I was far bigger, with a full head of white air. By 70, I was getting high marks in college, and like many of you, I peaked near the top of my company in my mid-50s and 40s. In my 30s I became lazy, tired. My 20s were less sharp; let’s not talk about my teens and younger. I lost control of my fine-motor skills and bowels around age 2. Knowing what’s coming next makes it far more dreadful than it must be for you.