For Paul, the word meant all of that but also much more. For him, this “believing allegiance” was neither simply a “religious” stance nor a “political” one. It was altogether larger, in a way that our language, like Paul’s, has difficulty expressing clearly. For him, this pistis, this heartfelt trust in and allegiance to the God revealed in Jesus, was the vital marker, the thing that showed whether someone was really part of this new community or not. That was already the position that Barnabas was taking.
Pistis the Greek word Paul used for Faith means faith as in belief but also following and allegiance and trust
