Seven virtues
The "Catechism of the Catholic Church" defines virtue as "a habitual and firm disposition to do the good." Traditionally, the seven Christian virtues or heavenly virtues combine the four classical cardinal virtues of prudence, justice, temperance and courage (or fortitude) with the three theological virtues of faith, hope and charity. These were adopted by the Church Fathers as the seven virtues.
Seven deadly sins
While the seven deadly sins as we know them did not originate with the Greeks or Romans, there were ancient precedents for them. Aristotle's "Nicomachean Ethics" lists several positive, healthy human qualities, excellences, or virtues. Aristotle argues that for each positive quality there are two negative vices that are found on each extreme of the virtue. Courage, for example, is the human excellence or virtue in facing fear and risk. Excessive courage makes one rash, while a deficiency of courage makes one cowardly. This principle of virtue found in the middle or "mean" between excess and deficiency is Aristotle's notion of the golden mean. Aristotle lists virtues like courage, temperance or self-control, generosity, "greatness of soul," proper response to anger, friendliness, and wit or charm.