I'm rocking my baby, and babies don't keep

"You'll miss the baby days," they used to say -
"So short and sweet and then all gone away,"
But I don't miss those days at all, I find,
While I am witness to your unfolding mind.

I loved the baby days: delight
And joy, us wide awake at night,
But now the baby girl is gone,
And you were in there growing, all along.

I love the child you are now so much more
Than ever I could love the girl before
And daily grows my joy, as you do grow,
That ever-changing you is who I know.