Aristotle too * 1.1, when he made virtue to con|sist in practical habits, had it probably in his view to oppose the doctrine of Plato, who seems to have been of opinion that just sen|timents and reasonable judgments concerning what was fit to be done or to be avoided, were alone sufficient to constitute the most per|fect virtue. Virtue, according to Plato, might be considered as a species of science, and no man, he thought, could see clearly and de|monstratively what was right and what was wrong, and not act accordingly. Passion might make us act contrary to doubtful and uncertain opinions, not to plain and evident judgments. Aristotle, on the contrary, was of opinion, that no conviction of the under|standing was capable of getting the better of inveterate habits, and that good morals arose not from knowledge but from action.
III. According to Zeno * 1.2, the founder of the Stoical doctrine, every animal was by nature recommended to its own care, and was indowed with the principle of self-love
