This Good News tells us how God makes us right in his sight. This is accomplished from start to finish by faith. As the Scriptures say, "It is through faith that a righteous person has life."
Faith. Belief. Trust. Confidence. What ever you want to call it, it means the same thing...
Faith that God is the creator of all things? Yup. Faith that God sent His son Jesus Christ to live here on Earth to become the living sacrifice that covers all our sins? Check. Faith that God knows what He's doing and how this is all going to end? Absolutely. Faith that we're not alone and that we are loved? Most definitely.
Faith gives us life.