Why Robert Jenson Believes in the Devil

I’ve just finished reading Robert Jenson, A Theology in Outline: Can These Bones Live? (Oxford: OUP, 2016). I really liked his comments about why he believes in the Devil or Satan:

The existence of a tempter (i.e., Satan, the Devil, Lucifer, the Old Serpent, etc.) is an ongoing conviction not just of Christianity but also of Judaism. And this reflects more than anything else a common experience: there does seem to be somebody out there laughing at us. I was very skeptical about the existence of Satan until I made that observation. The disasters that happen could just be disasters, but we seem to be mocked by them. And that is the main title of Satan throughout the tradition; he is theMocker, the one out there laughing at us. (p. 60).