Archaic smile
This rather artificial-looking smile was part of the formula for pre-classical (Archaic) statues. The smile is a sign of life or an indicator that the youth or maiden was at the height of their physical beauty, real, and alive; a mark of the inner ego or animus. Greek culture celebrated the intellect every bit as much as physical valor.
Contrapposto
Literally (in Italian), " to stand against." In its fullest meaning contrapposto is the scientifically understood distribution of the weights and balances of the body with corresponding higher or lower hip and shoulder to the weight-bearing leg or side. The Kritios Boy suggests contrapposto but the Doryphoros has been traditionally reckoned to be the first to employ it with full accuracy.