The Catechism of the Catholic Church defines virtue as "an 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.
The Greek philosophers Aristotle and Plato, regarded temperance, wisdom, justice, and courage as the four most desirable character traits.The Book of Wisdom is one of the seven Sapiential Books included in the Septuagint. Wisdom 8:7 states that the fruits of Wisdom "...are virtues; For she teaches moderation and prudence, justice and fortitude, and nothing in life is more useful for men than these."
The moral virtues are attitudes, dispositions, and good habits that govern one's actions, passions, and conduct according to reason; and are acquired by human effort.Immanuel Kant said, "Virtue is the moral strength of the will in obeying the dictates of duty". The cardinal virtues are prudence, justice, fortitude, and temperance.
Philosophers recognized the interrelatedness of the virtues such that courage without prudence risks becoming mere foolhardiness. Aquinas found an interconnection of practical wisdom (prudentia) and moral virtue. This is frequently termed "the Unity of the Virtues." Aquinas also argued that it not only matters what a person does but how the person does it. The person must aim at a good end and also make a right choice about the means to that end. The moral virtues direct the person to aim at a good end, but to insure that the person make the right choices about the means to a good end, one needs practical wisdom.