To be a true Christian it is not enough for us to keep the Commandments; we must also practice virtue.  By Christian virtue we mean the constant will and effort to do what is pleasing to God.

There are two kinds of virtue:
      The Theological or divine virtues
      The moral virtues.

The Theological or divine virtues are: Faith, Hope, and Charity.  They are called Theological or divine virtues because they have God for their immediate object.  They are placed into our soul when we are baptized.

The chief moral virtues are: Prudence, Justice, Fortitude, and Temperance.  They are called moral virtues because they bring our life into conformity with the moral law, regulating our conduct with regard to ourselves and our neighbor.  These four virtues are also called the four Cardinal virtues.
The four Cardinal virtues of Prudence, Justice, Fortitude and Temperance are divided into seven other moral virtues: Humility,Liberality, Chastity, Meekness, Temperance in Eating and Drinking, Brotherly Love, and Zeal.

The virtue of Faith leads us to believe in the existence of God, His divine perfections, and His revelations.  It is opposed to Infidelity.

The virtue of Hope helps us to look to God for eternal salvation and the means to gain it.
It is opposed to Despair and Presumption.

The virtue of Charity moves us to love God, that is, to seek to please Him by doing His Holy Will.
It is opposed to Ingratitude and Hatred.

The virtue of Prudence helps us not only to know and will what is good and right, but also to choose the proper means to do what is good and right.
It is opposed to Imprudence.

The virtue of Justice disposes us to render to our neighbor his rights. 
It is opposed to Injustice.

The virtue of Fortitude gives us courage to suffer anything in the performance of our duties.
It is opposed to Cowardice.

The virtue of Temperance helps us to keep our inclinations and desires within the bounds of what is lawful.  It is opposed to Intemperance.

We should try very hard to practice the four Cardinal Virtues because they are the foundation of a true Christian life.

The moral virtues of Humility, Liberality, Chastity, Meekness, Temperance in Eating and Drinking, Brotherly Love, and Zeal are opposed to the Seven Capital Sins.

The seven Capital Sins are: Pride, Avarice, Lust, Anger, Gluttony, Envy, and Sloth.
They are called the seven Capital Sins because they are the chief sources of sin.
Humility is opposed to Pride:
"Blessed are the poor in spirit: for theirs is the Kingdom of Heaven." (Matt. 5:3).

“God resisteth the proud, but to the humble He giveth grace.” (1 Ptr. 5:5).

Liberality is opposed to Avarice:
“Blessed are the merciful: for they shall obtain mercy.” (Matt. 5:7).
“The desire of money is the root of all evils.” (1 Tim. 6:10). 

Chastity is opposed to Lust:
“Blessed are the clean of heart: for they shall see God.” (Matt.5:8).
“Know you not, that you are the temple of God, and that the Spirit of God dwelleth in you?” 

(1 Cor: 3:16).

Meekness is opposed to Anger:
“Take up My yoke upon you, and learn of Me, because I am meek, and humble of heart; and you shall find rest to your souls.” (Matt. 11:29).
“Let every man be swift to hear, but slow to speak, and slow to anger.  For the anger of man worketh not the justice of God.” (James 1:19).

Temperance in eating and drinking is opposed to Gluttony:
“Whether you eat or drink, or whatsoever else you do, do all to the Glory of God.” (1 Cor. 10:31).
Take heed to yourselves, lest perhaps your hearts be overcharged with surfeiting and drunkenness, and the cares of this life.” (Luke 21:34).

Brotherly Love is opposed to Envy:
“By this shall all men know that you are My disciples, if you have love one for another.” (John 13:35).
“By the envy of the devil, death came into the world.” (Wis. 2:24).

Zeal is opposed to Sloth:
“Not every one that saith to Me, Lord, Lord, shall enter into the Kingdom of Heaven: but he that doth the will of My Father Who is in Heaven, he shall enter into the Kingdom of Heaven.” (Matt. 7:21).
“Every tree that bringeth not forth good fruit, shall be cast down, and shall be cast into the fire.” (Matt. 7:19).
 

Some of the rewards that God will give to those who practice Christian virtue are to be found in the Eight Beatitudes.  Jesus proclaimed the Eight Beatitudes in His Sermon on the Mount (Matt. 5, 6, 7).