It does make sense, if in a roundabout way. Maybe it's only here for the symbolism of it all: a child under the sun, dead but - in someone's mind, at least - happy. Or maybe it represents something more selfish, Mulder glorying in closing a case at seventeen. But that would be someplace in the after, wouldn't it? They're still in the during.

When she turns over the High Priestess, with the moon at her feet and a scroll labeled TORAH in her arms, Mulder's got no idea what it might mean. "So, what's our context?"