Faith and works

Explained very well.

Be deaf therefore when anyone preaches to you without mentioning Jesus Christ

St Ignatius of Antioch's letter to the Trallians;

  Be deaf therefore when anyone preaches to you without mentioning Jesus Christ, who was of the family of David, who was truly born of Mary, who truly ate and drank, was truly persecuted under Pontius Pilate, was truly crucified and died in the sight of those in heaven and on earth and under the earth; who was also truly raised from the dead, when his Father raised him up — just as his Father will raise us up, believers in Christ Jesus without whom we have no true life.

  Flee from these preachers, these wicked offshoots that bear deadly fruit, one taste of which is fatal. These have not been planted by the Father; if they had been, they would grow as branches of the Cross and their fruit would be incorruptible.