This short note provides a tentative formalization of Czeżowski's ideas about axiological concepts: Good and Evil are conceived of as modalities rather than as predicates. A natural account of the resulting “ethical logic” appears to be very close to standard deontic logic. If one does not resolve to become an antirealist regarding moral values, a possible way out is to become a revisionist about deontology: convert to intuitionism or other kind of revisionism for deontic logic, and remain classical for ethical (...) logic. (shrink)