Lesson 1 God is a Trinity of Persons Catechism Connections Lesson Topics Trinity Essential Lessons N/A Lesson Vocabulary Mystery: From the Greek word mysterion, mystery originally meant the same thing as sacrament: a visible sign of God’s grace. Person: A unique individual. God is three Persons in one God. Trinity: “Three in one.” God is three Persons in One God: God the Father, God the Son, and God the Holy Spirit. God revealed to us that He is a Trinity. Teach Hands and Feet Video The Baptism of Christ (c. 1568)jpg Extend Catch the Spirit Parent Newsletterpdf