Individual

What is impossible to dualise. In-divi-dual. A whole unit. 
Man is a legion of selves, of lesser I-s. Incoherently he works against himself. One that is notably incoherent is said to be not whole—not one in which individuation is a fact.
One who is very coherent, such as e.g. St. Aquinas, is said to be whole or holy—thus, Saint—the opposite of Broken or ruined.