Proposals for an ethical code for scientists raise questions about the usefulness of the framework of professional ethics for debating relevant issues surrounding ethics and science. Is science a profession and if so should its professional ethic be self-derived or subject to external input? What needs to be addressed is the nature of the 'good' that science promotes. Explanations of science as a public good in terms of knowledge and diversity are possibilities, but science's answer to the basic philosophical question of hope in the human condition should not be overlooked.