My wife and I have arrived at that poignant age when we can’t believe how quickly time has passed—especially while looking at one of my favorite videos of our oldest son, taken when he was just 2 years old. Miska and I had gone out for a date, and the kid-sitter shot a short video of our boy clinging to the bottom ledge of the living room window. He was just tall enough to peek over the edge. As he watched us get in our car and drive away, he said, “Momma. Dadda.” There was an anxious longing in his…