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.
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.