The dative of advantage. Justification is not forgiveness. It is more than forgiveness. While forgiveness is a part of it, it is not all of it. A child may throw a rock through a window and admitting wrong be forgiven, but he is still guilty.
Justification removes the guilt.
Justification is not a pardon. It is more than a pardon. A pardon covers sins of the past. No judge has ever issued a pardon for future crimes. Justification deals with the sins of the past, present, and the future.