Egoism as a Theory of Human Motives

Now it is plain that such consequences as these conflict sharply with common-sense notions of morality. If we had been obliged to accept Psychological Egoism, in any of its narrower forms, on its merits, we should have had to say: 'So much the worse for the common-sense notions of morality!' But, if I am right, the morality of common sense, with all its difficulties and incoherences, is immune at least to attacks from the basis of Psychological Egoism.