 If we adopt a weaker interpretation of impartiality, we see the justification of altruism simply by seeing that we have a duty to aid other people in certain circumstances. The moral rule that requires us to help others is a rule that calls upon us to help them not as a means to our own good, but simply in virtue of their need. And we see the rule as justified by recognizing that it strikes a proper balance between our self-concern and the appropriate claims of others.