There is nothing more precious than a sleeping toddler. Your infant may be just as cute- perhaps even prettier in her itsy bitsyness, just as peaceful and warm. But you didn't earn it. Not like you do with a toddler* By virtue of the contrast between the frantic demonic possession and hysteria of 15 minutes ago, the now-sleeping baby is the most cherubic divine sweetness I've ever seen.
*Unless you are Ciaran's or Viktor's mom.