§ 1. Before, however, we attempt to define particular virtues or departments of duty, it will be well to examine further the notions of Duty and Virtue in general, and the relations between the two, as we find them implicitly conceived by the common sense of mankind, which we are endeavouring to express. Hitherto I have taken Duty to be broadly convertible with Right conduct: I have noticed, however, that the former term--like “ought” and “moral obligation”--implies at least the _potential_ presence of motives prompting to wrong conduct; and is therefore not applicable to beings to whom no such conflict of motives can be attributed. Thus God is not conceived as performing duties, though He is conceived as realising Justice and other kinds of Rightness in action. For a similar reason, we do not commonly apply the term ‘duty’ to right actions--however necessary and important--when we are so strongly impelled to them by non-moral inclinations that no moral impulse is conceived to be necessary for their performance. Thus we do not say generally that it is a duty to eat and drink enough: though we do often say this to invalids who have lost their appetite. We should therefore perhaps keep most close to usage if we defined Duties as ‘those Right actions or abstinences, for the adequate accomplishment of which a moral impulse is conceived to be at least occasionally necessary.’ But as this line of distinction is vague, and continually varying, I shall not think it necessary to draw attention to it in the detailed discussion of duties: it seems sufficient to point out that we shall be chiefly concerned with such right conduct as comes within the definition just suggested.