Catherine Newman, in a story enticingly entitled “Yes, parenting is hard. But it gets better.” in Motherwell (on parenting a young child vs. parenting an older child who can dress themselves, refrains from eating pennies, etc.):
You know how you’re tired? So tired that you mistake talking in an exhausted monotone about your tiredness for making conversation? You won’t be tired. Or rather, you will sometimes be tired, sometimes rested, like regular people are.