Humanities-based, ethical forms of humanism remind us that we are spiritual, cultured, and moral beings: we are formed by our human environment as well as by our physical nature. Scientific humanism reminds us that we are animals, too, and that we live in a constant process of transition on a changing Earth, in a very large universe. If everything is in a good balance, these visions of ourselves do not work at cross-purposes; they inform and enhance one another.