I believe this is worthy of becoming almost a Creed to be professed and lived by all who would call themselves men:
A virtue is a habitual and firm disposition to do the good. The virtuous person tends toward the good with all his sensory and spiritual powers; he pursues the good and chooses it in concrete actions.
Human virtues are firm attitudes, stable dispositions, habitual perfections of intellect and will that govern our actions, order our passions, and guide our conduct according to reason and faith. They make possible ease, self-mastery, and joy in leading a morally good life. The virtuous man is he who freely practices the good.
Prudence is the virtue that disposes practical reason to discern our true good in every circumstance and to choose the right means of achieving it; “the prudent man looks where he is going.
Justice is the moral virtue that consists in the constant and firm will to give their due to God and neighbor. (Justice toward God is called the “virtue of religion.”)
Fortitude is the moral virtue that ensures firmness in difficulties and constancy in the pursuit of the good.
Temperance is the moral virtue that moderates the attraction of pleasures and provides balance in the use of created goods.
Human virtues acquired by education, by deliberate acts and by a perseverance ever-renewed in repeated efforts are purified and elevated by divine grace. With God’s help, they forge character and give facility in the practice of the good. The virtuous man is happy to practice them.
The human virtues are rooted in the theological virtues, which adapt man’s faculties for participation in the divine nature. The theological virtues have the One and Triune God for their origin, motive, and object. The theological virtues are the foundation of Christian moral activity;
Faith is the theological virtue by which we believe in God and believe all that he has said and revealed to us, and that Holy Church proposes for our belief, because he is truth itself.
Hope is the theological virtue by which we desire the kingdom of heaven and eternal life as our happiness, placing our trust in Christ’s promises and relying not on our own strength, but on the help of the grace of the Holy Spirit.
“To love is to will the good of another.” Charity is the theological virtue by which we love God above all things for his own sake, and our neighbor as ourselves for the love of God.
An only somewhat shorter version would be the IN BRIEF part of the Catechism on virtues:
1833 Virtue is a habitual and firm disposition to do good.
1834 The human virtues are stable dispositions of the intellect and the will that govern our acts, order our passions, and guide our conduct in accordance with reason and faith. They can be grouped around the four cardinal virtues: prudence, justice, fortitude, and temperance.
1835 Prudence disposes the practical reason to discern, in every circumstance, our true good and to choose the right means for achieving it.
1836 Justice consists in the firm and constant will to give God and neighbor their due.
1837 Fortitude ensures firmness in difficulties and constancy in the pursuit of the good.
1838 Temperance moderates the attraction of the pleasures of the senses and provides balance in the use of created goods.
1839 The moral virtues grow through education, deliberate acts, and perseverance in struggle. Divine grace purifies and elevates them.
1840 The theological virtues dispose Christians to live in a relationship with the Holy Trinity. They have God for their origin, their motive, and their object – God known by faith, God hoped in and loved for his own sake.
1841 There are three theological virtues: faith, hope, and charity. They inform all the moral virtues and give life to them.
1842 By faith, we believe in God and believe all that he has revealed to us and that Holy Church proposes for our belief.
1843 By hope we desire, and with steadfast trust await from God, eternal life and the graces to merit it.
1844 By charity, we love God above all things and our neighbor as ourselves for love of God. Charity, the form of all the virtues, “binds everything together in perfect harmony” (Col 3:14).
1845 The seven gifts of the Holy Spirit bestowed upon Christians are wisdom, understanding, counsel, fortitude, knowledge, piety, and fear of the Lord.