Different Point of View

What Message is Conveyed When Only the Back is Shown (rear view)?

What about a lower angle looking upwards?

David, Marble, 1504
Galleria dell'Accademia, Florence

"Michelangelo's David, sculpted from 1501 to 1504, is a masterpiece of Renaissance sculpture .... The 5.17 meter (17 ft)[1] marble statue portrays the Biblical King David in the nude, at the moment that he decides to battle with Goliath. It came to symbolize the defense of civic liberties embodied in the Florentine Republic, an independent city state threatened on all sides by more powerful rival states and by the hegemony of the Medici themselves."

In the above case, the lower angle emphasizes the courage portrayed in both the Biblical story and the Florentine Republic's. The angle also glorifies the decision to stand up to their rivals.
In photography, a lower angle looking up creates a child's point of view for the viewer (rather than authoritative). This puts the subject on a pedestal.

Cornelisz (Cornelis van Haarlem)
DenmarkMars and Venus

In the above picture, the man's back is turned to the viewer. This suggests that he is attempting to shut the viewer out.

Both concepts can be seen in Wilkes's work: