Justification is the doctrine that simply tells us what God says about us. Anything more than that is outside this definition and would probably be found in the doctrine of sanctification.
Faith is defined in two ways in this study. Fides Qua Creditur & Fides Quae Creditur
Fides Qua Creditur (pronounced fee-des kwah cred-it or) is defined as the faith BY which we believe. This is the faith that is given to us but not yet exercised by us. Also this is not a gift that justifies us. This is the faith that we receive after we have been declared righteous. This is done because of the faithfulness of Christ and for his sake.
Fides Quae Creditur (pronounced fee-des kw-eye cred-it or) is defined as the faith IN which we believe. This is the faith that we exercise after having received it. This is not a gift that justifies us either. This is the faith that we express because it has been given to us. This falls under the doctrine of sanctification. This is faith exercised in response to the faithfulness and work of Christ.
Section 1 (Click "Read More" for audio)