I believe that you are the one that is confused, and one reason is because you are using a bible version that has changed the wording in Gal 2:16. Knowing that a man is not justified by the works of the law, but by the "faith of Jesus Christ", not, "faith in Jesus Christ". The little word "in" changes the faith of Jesus to the faith Of man. --even we have believed in Jesus Christ, that we might be justified by the "faith of Christ", not "faith in Christ". Check your version with the KJV.