Since, by his own active generating, the Ego constitutes himself as identical substrate of Ego-properties, he constitutes himself also as a "fixed and abiding" personal Ego — in a maximally broad sense, which permits us to speak of sub-human "persons". Though convictions are, in general, only relatively abiding and have their modes of alteration (through modalization of the active positings — for example, "cancellation" or negation, undoing of their acceptance), the Ego shows, in such alterations, an abiding style with a unity of identity throughout all off them: a "personal character".
— Edmund Husserl, Cartesian Meditations, tr. D. Cairns.