His third position is the Influence of our Opinions on Happiness. He here quotes, from Ferguson, examples of opinions unfavourable to Happiness; such as these: 'that happiness consists in having nothing to do,' 'that anything is preferable to happiness,' 'that anything can amuse us better than our duties.' He also puts forward as a happy opinion the Stoical view, 'I am in the station that God has assigned me.' [It must be confessed, however, that these prescriptions savour of the Platonic device of inculcating opinions, not because of their truth, but because of their supposed good consequences otherwise: a proceeding scarcely compatible with an Ethical system that proclaims veracity as superior to utility. On such a system, we are prohibited from looking to anything in an opinion but its truth; we are to suffer for truth, and not to cultivate opinions because of their happy results.] Stewart remarks finally on the influence of the Habits, on which he notices the power of the mind to accommodate itself to circumstances, and copies Paley's observations on the _setting_ of the habits. In continuation of the subject of Happiness, he presents a classification of our most important pleasures. We give the heads, there being little to detain us in the author's brief illustration of them. I.--The pleasures of Activity and Repose; II.--The pleasures of Sense; III.--The pleasures of the Imagination; IV.--The pleasures of the Understanding; and V.--The pleasures of the Heart, or of the various benevolent affections. He would have added Taste, or Fine Art, but this is confined to a select few. In a concluding chapter (V.), he sums up the general result of the Ethical enquiry, under the title, 'the Nature and Essence of Virtue.' No observation of any novelty occurs in this chapter. Virtue is doing our duty; the intentions of the agent are to be looked to; the enlightened discharge of our duty often demands an exercise of the Reason to adjudge between conflicting claims; there is a close relationship, not defined, between Ethics and Politics. The views of Stewart represent, in the chief points, although not in all, the Ethical theory that has found the greatest number of supporters. I.--The Standard is internal, or intuitive--the judgments of a Faculty, called the Moral Faculty. He does not approve of the phrase 'Moral Sense,' thinking the analogy of the senses incorrect. II.--As regards Ethical Psychology, the first question is determined by the remarks on the Standard. On the second question, Free-will, Stewart maintains Liberty.