The first picture is the oldest known icon of Christ Pantocrator, encaustic on panel (Saint Catherine’s Monastery, Mount Sinai). The two different facial expressions on either side emphasize Christ’s dual nature as fully God and fully human. Created circa the 6th century.
When cut in half, and the mirror images are put together, they create 2 distinct icons with very different images of god. This 2nd image is the judging Christ with the book of the law. The 3rd image is a more gentle, forgiving Christ figure.