With the exception of Christianity, every other world religion has at its core some system of good works by which the followers may earn God’s favor -- earn salvation.
“What we believe, what comes into our minds when we think about God is the most important thing about us...we tend by a secret law of the soul to move toward our mental image of God.”
When you teach that Justification before God has nothing to do with them and everything to do with Jesus, they need to know that when they fall, stumble, or screw up (and we all do) they are able to RUN TO GOD, and not from Him.
But how can they call on him to save them unless they believe in him? And how can they believe in him if they have never heard about him? And how can they hear about him unless someone tells them?
Or have you forgotten that when we were joined with Christ Jesus in baptism, we joined him in his death? For we died and were buried with Christ by baptism. And just as Christ was raised from the dead by the glorious power of the Father, now we also may live new lives. Since we have been united with him in his death, we will also be raised to life as he was.
For I am not ashamed of this Good News about Christ. It is the power of God at work, saving everyone who believes -- the Jew first and also the Gentile. This Good News tells us how God makes us right in his sight. This is accomplished form start to finish by faith. As the Scriptures say, “it is through faith that a righteous person has life.