The Love of Charity is a perfect virtue, a grace infused by the divine wisdom: "Everything is pure for the pure" Epistle to Titus 1:15
In the Epistle to Titus the apostle Paul exhorts about those who should preside over the community, in their capacity as administrators of God.
The pure man is the man gifted with the infused virtue of Charity. The origin of the infused virtues in the spiritual man, in a strict sense, is the Gnosis or spiritual rebirth: "No one can see the Kingdom of God unless they are born again", John 3: 3.
To affirm that Faith and Hope are infused virtues that belongs to the field of Theology, that is, to the particular religion or cult to which one belongs. Theology means treaty about God. We must distinguish the infused virtue from the natural virtue, natural virtue such as prudence and justice are related to habit and practice, belong to the field of the human soul; the infused virtue responds to the sphere of the spirit and they are permanent dispositions whose origin is divine and which transform the personality of man.
Charity as infused virtue once acquired can not be lost, because the essence of the spiritual man is wisdom, concupiscence, that is, the inclination to sin, in the pure man it does not exist as such.
The infused virtues, that is to say the gifts (perfect virtues) of knowledge, wisdom and discernment, transform the essence of man, without altering the substance. The pure man is the most blessed man by excellence, in him eternal life and hope are realized: "Blessed are the pure in heart for they will see God", Matthew 5: 8.
In the time of Jesus Christ, the administration of the Temple and of religion was subject to rules of purity and impurity as it appears in the Books of Leviticus and Numbers. The Apostle Paul demands that those who are administrators of God, priests, should perceive the world with the the purity and light of the wisdom, the Love for the Good: "The spiritual person judges all things, but he himself is not subject to anyone's judgment", 1 Corinthians 2:15. For the wise, everything is pure.
The apostle Paul finally warns, in the Letter, about those who can not inherit the Kingdom of God: "the sorcerers, the lustful, the murderers, the idolaters and all those who love and practice falsehood", Revelation 22:15.