| A | B |
| Incarnation | The Son of God assuming human nature while retaining his divine nature. Literally means "to become flesh" |
| Theotokos | A Greek title for Mary meaning "God bearer" |
| Christological | having to do with the study of the divinity of Jesus Christ |
| Protoevangelium | the first announcement of the Good News and promise of God's redemptive love through the person of Jesus Christ |
| Paschal Mystery | the work of salvation accomplished by Jesus Christ mainly through his Passion, death, Resurrection, and Ascension |
| Trinity | from the Latin trinus, meaning "threefold," referring to the central mystery of the Christian faith that God exists as a communion of three distinct and interrealated Divine Persons: Father, Son, and Holy Spirit. |
| expiation | The act of atoning for sin or wrongdoing |
| patriarch | The father or leader of a tribe, clan, or tradition. Abraham, Isaac, and Jacob were the patriarchs of the Israelite people |
| Immaculate Conception | The dogma that Mary was conceived without Original Sin and remained free from personal sin throughout her entire life |
| analogy of faith | the coherence of individual doctrines with the whole of Revelation |
| Annunciation | God's invitation to Mary to be the Mother of God |
| Ark of the Covenant | sacred chest that housed the tablets of the Ten Commandments |
| Judges of the Old Testament | military leaders |
| the Exile | the period after the Israelites captivity |
| fratricide | to kill ones own brother or sister, the first sin after the Fall |
| Transfiguration | when Jesus appears to the disciples with Elijah and Moses |
| polytheism | worship of many gods |
| theophany | a direct revelation or visible appearance of God |
| Torah | made up of the first five books of the Old Testament |
| Emmanuel | God is with us |
| Messiah | means "anointed one" and is the hebrew word for the Greek word Christ |
| clement | another word for merciful |