As I’ve said before, the great challenge for an artist–whether an author, musician, painter, or whatever–in depicting Jesus Christ is how to portray Him as both God and Man. In Christmas art, some work portrays Him in His humanness as a cute little baby. Other work, such as the classic icons, show the Child as transcendent God. Both are fine, conveying profound truths about who Christ is. But the very best art about Christ somehow evokes BOTH His divinity and His humanity.
By the way, for what Mary DID know, see Rev. Charles Henrickson, here.