It is to treat everything as novelty and everything with a sense of wonderment and with a desire for renewal. G.K. Chesterton, whose birthday is today, speaks of it when he describes children and their exclamation "Do it again!" until the grown-up is nearly dead.
I think this very much God's approach to us and our days, never tiring. We too must rise and say to the morning "Do it again!" We may not always have the vigor in this life to make all things novelties, but God has made all things new. Therefore, we are called to renew and be renewed. This is our view into Eternity.
"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