Practicing virtue is just like practicing any other skill: rules help early on, but at true excellence, rules are no longer needed. For example, prophet Isaiah differentiates those merely following rules and those who have a more faithful inner disposition. Knowing that, let’s see what virtues are.
Aristotle defined virtues into 3 categories: moral (helps us live well and flourish), intellectual (helps us think well), and practical (helps us make things well). For Cicero, morally right actions spring from four cardinal (cardo means hinge, that on which a thing turns) virtues: fortitude, temperance, justice, and prudence. Augustine praised the four in his earlier work, but later (in The City of God) sees those as fundamentally flawed unless paired with the theological virtues (faith, hope, and charity). In more recent times, Hume, Kant, and John Stuart Mill all have their notion of virtues. Recently, positive psychologists identified “high six” virtues (courage, justice, humanity, temperance, transcendence, and wisdom) that exist throughout cultures. Among these, Plato saw justice as most important, Aristotle thought it was prudence, and Aquinas charity. There are a few alternative views of how virtue really works, but it all boils down to this: virtue function as a way of achieving happiness.
Intellectual virtues are the habit of minds that help us pursue truth and avoid errors: curiosity (Socrates says “philosophy has no other starting-point than wonder”), honesty, humility, and perseverance. Concerning humility: the Dunning Kruger effect says “People who lack the knowledge or wisdom to perform well are often unaware of this fact … The very same incompetence … deprives them the savvy necessary to recognize competence, be it their own or anyone else’s”. Socrates repeatedly stresses the importance of truth over persuasion. Plato claims knowing the good always leads to doing the good. Aristotle disagrees and separates virtues of thought and virtues of character. It turns out, untruth has shades too: For liars, the differences between the true and the false is important. For bullshiters, it’s not. To Frankfurt (author of “On Bullshit”), the indifference to the truth is the essence of “bullshit”.
Theological virtues (Christian) are faith, hope, and charity. Augustine went as far as saying without theological virtues, the cardinal ones are mere glittering vice. Aquinas is more reasonable and explains that we can grasp moral truths, but can’t consistently act on them. And the solution is divine grace where God doing for us what we can’t do ourselves. By receiving in faith the goodness that is God, people can participate the life of God. Faith is assent to truth that we decide not to verify. Of course, faith needs to be distinguished from gullibility and superstition. Aquinas defines hope as the patient expectation of a difficult but possible future good. Hope defends us against two kinds vices: despair and presumption. Those who fall into despair consistently refuse to see the good they desire as possible. Charity is a kind of participation in the life of God (as friends participate in one another’s life). Of course, outside Christianity, others have different virtues. Muslims have the 5 pillars (faith, prayer, alms, fasting, and pilgrimage); Confucianism calls for 孝(filial piety), 义(righteousness, justice), 礼(ritual propriety), 智(wisdom) 信(trustworthiness) 仁(charity)、恕 (reciprocity as in golden rule).
Vices. A fairly standard list of vices with 7 at the head (capital): pride, envy, avarice, wrath, sloth, lust, and gluttony. Pride: vanity (which involves an audience), conceit (requires a comparison that elevates self), and arrogance (simply consider self superior w/o bothering to investigate). Wrath: anger itself is not necessarily vice (for instance when demanding justice). But when there is excessive anger (seething resentment) and it becomes a feature of the character, it becomes a vice.