Boethius definition The Catholic Encyclopedia refers to Boethius definition of person Natur rationalis individua substantia an individual substance of a rational nature as the classic definition one on which they elaborate as a basis for further treatment they get into Trinitarianism actually I have to admit its a good definition person ultimately has something to do with rationality an individual something of a rational nature I know you ve been doing a lot of good work here Pfhorrest what do you think t c