Because children have abounding vitality, because they are in spirit fierce and free, therefore they want things repeated and unchanged. They always say, "Do it again"; and the grown-up person does it again until he is nearly dead.For grown-up people are not strong enough to exult in monotony. But perhaps God is strong enough to exult in monotony. It is possible that God says every morning, "Do it again" to the sun; and every evening, "Do it again" to the moon.It may not be automatic necessity that makes all daisies alike; it may be that God makes every daisy separately, but has never got tired of making them.It may be that He has the eternal appetite of infancy; for we have sinned and grown old, and our Father is younger than we. ― G.K. Chesterton, Orthodoxy
I like that last sentence a lot:
... for we have sinned and grown old, and our Father is younger than we.
That rings true to me, this idea that death involves growing old mentally as well as physically, while God is eternally what we may attribute to "youth" but is really strength enough to exult in what we consider monotony or take for granted ("the sun always rises.")
In reality that "Again! Again!" is a never-ending cycle of seeing newness in the not-new (for lack of better vocabulary - sorry!) or of seeing beauty in the ordinary and finding the miraculous in the every day. We often forget the miracle of "do it again!" –– it's been lost as we see right past it or right through it.