He never stops smiling. In fact, his smile is so perpetual as he talks that I have learned a few things about consonant pronunciation: it is possible, for example, to create the same sounds with lower lip and teeth as lower and upper lip. Like an "m." Apparently the same sound can be accomplished without a smile ever disappearing.

And the thing is, he's talking about the glory of God -- as revealed through the death of his firstborn baby boy.