Disclaimer: Unfortunately for me, it belongs to Terry Pratchett and Neil Gaiman.
Sometimes, He smiled.
Well, honestly, He was usually smiling. He found something to be glad about most of the time--a child's song, a young woman's honest ambition, an old man reconciling with his grandson--and on the rare occasion that He couldn't, He found it made the other side a bit nervous.
It was all ineffable, of course, but He liked to keep some things secret, even from Himself. When He saw an angel and a demon drink together, He was not surprised, precisely; pleased, and satisfied, as one who has set difficult plans feels when they come to an almost unexpected fruition, but not shocked.
The first time He saw the demon tentatively touch the angel's shoulder, the first time He saw the angel remove the demon's sunglasses, the first time he saw the demon coaxing the angel to sleep and then the angel doing so--He smiled.