| Term | Definition |
| Mystery of the Holy Trinity | one God in 3 persons, God the father, son and Holy Spirit |
| God the Father | first person, holy trinity |
| God the Son | Jesus Christ, second person, became one of us |
| God the Holy Spirit | third person, advocate, paraclete, sent to us by the Father |
| Divine Missions | work of creation, work of salvation, work of sanctification |
| Divine work of creation | work of bringing creation into exestince out of love and without any help |
| Angels | spiritual creatures who give glory and serve God |
| human person | creations in the image and likeness of God |
| soul | spiritual part of who we are, immortal, imprint of the image of God |
| intellect | power to know God ourselves and others, power ot understand the order of things established by God |
| free will | God-given abilities, power to recognize him as part of our lives choose to center our lives around him, choose between good and evil |
| original sin | sin of Adam and Eve by which they choose evil over obedience to God and so lost the state of original holiness |
| Annunciation | announcement by Angel Gabriel chosen to be Mother of Jesus the Son of God |
| Incarnation | Jesus Christ is true God and true man |
| Paschal Mystery | Passion Death Resserection and Ascension of Jesus Christ Gods plan of Salvation |
| Salvation | saving from the power of sin and death through Jesus Christ |
| Ascension | return of the Risen Christ to the glory of his father |
| Second Coming of Christ | return of Christ in glory end of time, to judge the living and the dead |
| Jesus is Lord | master, ruler a person of authority, used in old testament, expresses Jesus is truly God |
| Jesus is Messiah | anointed one |