Potency and Act is the second of three works in which Edith Stein said she endeavored to fulfill her “proper mission’ in philosophy, her “life’s task”: relating the phenomenology of her teacher Edmund Husserl and the scholasticism of St. Thomas Aquinas. But more than “critically comparing” the two ways of thinking, she wished to “fuse” them into her own “philosophical system,” searching for that perennial philosophy lying “beyond ages and peoples, common to all who honestly seek truth.”