Virtue — the Greek aretē and its cognates — occupies contested terrain across the depth-psychology corpus, functioning simultaneously as an ethical ideal, a psychological capacity, a theological gift, and, in Nietzsche’s provocative rereading, a potential disguise for resentment and the will to power. The corpus encompasses at least four distinguishable orientations. The Platonic tradition, represented by the Meno and Protagoras, frames virtue as a philosophically unstable unity: something sought as a single essence yet perpetually fragmenting into justice, temperance, courage, and prudence, and remaining uncertain as to whether it is teachable at all. The Stoic lineage, mediated through Long and Sedley, insists on virtue as a stark binary — present or absent, never merely progressing — and as choiceworthy for its own sake. The Christian ascetical tradition, above all in the Philokalia, recasts virtue as inseparable from divine grace: the cardinal virtues are real but remain ‘shadows and prefigurations’ without the animation of the Holy Spirit. Nietzsche, and Jung reading Nietzsche, rupture the entire classical economy by insisting that conventional virtue is often a ‘brake,’ a vehicle of revenge and social conformity, and that authentic virtue is power affirmed as a ruling idea. Hans Jonas introduces the Gnostic anti-virtue: the deliberate contempt for all worldly aretē as an expression of the alien-god theology. These tensions — nature versus grace, unity versus plurality, cultivation versus gift, authentic power versus reactive moralism — make virtue one of the most generative and contested nodes in the library.