But if it is asked: "What, then, is really pure morality, by which as a touchstone we must test the moral significance of every action," then I must admit that it is only philosophers that can make the decision of this question doubtful, for to common sense it has been decided long ago, not indeed by abstract general formulae, but by habitual use, like the distinction between the right and left hand.
izan ere, giza arrazoimen arruntean aspalditik erabaki baita, eskuin eta ezker eskuen arteko aldea bezala, ez noski formula orokor garaien bidez, baizik eta erabilera arruntaren bidez.