What we believe - Historical Perspective
In one sense, the Reformed faith is simply the apostolic faith of the catholic church restored to her according to the Word of God. The sixteenth century Reformers had no intention or concept of establishing a particular "brand" of Christianity or a new "tradition" within Christianity, let alone a new church.
They simply believed that the medieval church had strayed from the catholic faith and that God had called them to reform Christ's one Church according to Christ's own Word, rather than the teachings of man, which were not inspired by the Holy Spirit.
Hence one of the catch-cries of the Reformation period was Scripture Alone! Over against the medieval idea of earning merit before God by one's good deeds, or receiving merit or indulgences from the church, they taught that salvation was By Grace Alone!, In Christ Alone, and Through Faith Alone.