The great ethical innovators have not been men who knew more than others; they have been men who desired more, or, to be more accurate, men whose desires were more impersonal and of larger scope than those of average men. Most men desire their own happiness ; a considerable percentage desire the happiness of their children; not a few desire the happiness of their nation; some, genuinely and strongly, desire the happiness of all mankind. These men, seeing that many others have no such feeling, and that this is an obstacle to universal felicity, wish that others felt as they do.
Source: Power, a new social analysis, 1938, by Bertrand Russell<
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