For if some one felt goodwill towards Darius, when he was alive among the Persians, as some one may have done, it did not follow that he had a friendship towards Darius); but goodwill would seem to be sometimes the beginning of friendship, and goodwill may become friendship if, where one has the power to do good, there be added the wish to do it for the sake of the person towards whom the goodwill is felt.