In this paper I address happiness of human life developed in Hume’s Treatise and Essays: Moral, Political, and Literary. According to Hume, people are happiest and governments are most stable when emotional calmness prevails. Hume has a strategy, which I call “moderation through opposition,” which is designed to “tranquilize and soften” the passions. Hume presents moderation as an alternative of the phyrronean skepticism in Book 1 of the Treatise. Hume also presents moderation as the virtue of sagacity and as the characteristics of strength of mind in the discussion of calm passion in Book 2 of the Treatise. Hume makes it clear that this sagacity or strength of mind is really nothing other than the prevalence of the calm passion above the violent. The calm passions are sometimes confused with reason due to their arising manner. They arise in the manner of controlling violent passions or desires, so that we confuses them with reason. The most important difference between the two styles, i.e., Essays and the Treatise has to do with their function. The purpose of Treatise is to make us understanding something; the function of easy essay writing is to change our feelings and actions. The purpose of an easy essay is thus therapeutic rather than analytic. Such essays, according to Hume, are designed to make us feel the difference between vice and virtue: they excite and regulate our sentiment. Hence, Hume argues that the path to happiness lies in strengthening the calm passions, and the way to do this is by cultivating a relish in the liberal arts. A cultivated taste for the polite arts extinguishes the violent passions and improves our sensibility. As we read, study, and enlarge our view of the world, we enhance the calm passions and achieve greater happiness.