Aging: physical features changing; learning from our children by comparing their thoughts and attitudes to people I dealt with in my life; identifying with our grandchildren by relating their experiences to ours; learning to handle situations better by reducing emotional reactions, etc. So, being a father sharpened my experiences of time, exhaustion, fun, travel, excitement, conflict, happiness, hugs, handshakes, hurts, smiles, frowns, and more. What a ride it has been!