God's plan is to freely forgive us of the sins for which Jesus died on the cross. This message of "justification" bears a few important implications for living faithfully as a Christian today.
At certain times in the history of God's plan of redemption, God has spoken his promises through the mouths of angels. In Luke's account of Gabriel's message to Zechariah, the father of John the Baptist, we are reminded that God's promises never fail.
The Light of the Cross, Lesson 1.
The Sun defines our solar system by its light in which so many parts become visible. Also, the Sun defines our solar system by the force of its gravity, which holds everything together in their relative orbits as a system. In a similar way, the message of justification--the good news of the cross of Jesus of Nazareth--defines everything that faithful Christians must believe.
Maps of the nations around the world clearly depict the borders between them. Where is the border of the Kingdom of God? In a few places in the New Testament, God's messengers set standards for discipline of troublesome church members. These cases teach us how Jesus' defines the boundary of his own community.