I had a similar moment this morning while reading a book to my son. I told him "You remember this book? Your grandmother got this book for you when you were 10 months old, less than half your current age."

And it just occurred to me that my son's entire lifetime is less than half the time I've been married to my wife. The time I've been married to my wife is less than half the time I've lived in the Bay Area. The time I've lived in the Bay Area is less than a third of my total lifetime.

We all live multiple lifetimes. Some moments just remind us of that more than others.