Pastor Corey Dykstra of Hope Reformed Church in Brampton Ontario in a sermon on the responsibilities of church office insisted that one is not called to preach until that is confirmed by an established ecclesiastical body. So what is to prevent you from engaging in the homiletical act anyway. Furthermore, on what grounds does he then hold to the likes of Calvin being a valid minister he the duly constituted organizational authorities of that day viewed the reformer as has having apostatized from his office?