Freely choosing to forego earthly marriage "for the sake of the kingdom of heaven" that is, for the sake of the heavenly marriage of Christ and the Church
Celibacy
The "common union" between two or more persons who give themselves to one another in love; they see in each other the image and likeness of God and want the best for the other.
Communion of persons
The "inclination to sin" that is present in all humans, inherited through the sin of Adam and Eve, and against which we must struggle to resist "by the grace of Jesus Christ."
Concupiscence
The opposite of hope, the resolve to give up pursuing whatever was initially pursued.
Despair
The inherent and unchanging value of all persons as a direct result of their being creaated by God in his image and likeness.
Dignity
A decision to "will the good of another" person.
Love
A sexual desire apart from God's love, a selfish desire that seeks one's own pleasure at the expense of another.
Lust
The first sin of mankind against God, when Adam and Eve chose to disobey God's command and do what they wanted instead.
Original sin
It is an outward sign "instituted by Christ and entrusted to the Church, by which divine life [grace] is despended to us."
Sacrament
The common term for escaping sexual "rules" so as to do whatever one wants with his or her sexuality.
Sexual liberation
The study of God, or "faith seeking understanding."
Theology
A study of God and the purpose of our existence, as discovered and revealed through our bodies
Theology of the Body