"You're getting so tall."

My oldest grandchild, my grandson will be 13 next month.  We were together in church this morning when a friend of mine said to him "My goodness, you're getting so tall." and he is.  Suddenly the little boy is looking so much more like a young man.  Some weeks ago we were walking somewhere together across a parking lot and as we approached a curb he took my hand and it took me a minute to realize that he wasn't looking to me for help, he was offering to help me.  Roles are shifting, life moves on.  it will be fascinating to watch the next many years unfold.