original sin

The sin wherewith we sinned in Adam is natural in me, personal in Adam. In Adam it is graver, in me less grave; for in him I sinned not as who I am but as what I am. It was not I that sinned in him, but what I am; I sinned in him as man, not as Odo; as substance, not as person. Because the substance does not exist save in the person, the sin of the substance is the sin of the person, yet not personal. That sin is personal which I commit as who I am, not as what I am; by which I sin as Odo, not as man; by which I sin as person, not as nature.

Odo of Cambrai "De Peccato Originali" (Migne, P.L. 160:1085)