Magda Arnold is recognised as one of the pioneers of modern cognitive approaches to the study of emotion. Indeed, her definition of appraisal is still employed more or less unchanged by many researchers. Somewhat less well known is Arnold's broader theory of emotion, personality, and human development that formed the context for her ideas about appraisal. In this paper, I examine the influence of the psychology of Thomas Aquinas on Arnold's thinking about appraisal, emotion, the self and self-actualisation. I then (...) critique current conceptions of appraisal in the light of her ideas about emotion and the person. I end with a plea to broaden our conception of what constitutes a moral emotion. (shrink)