Do not be led astray by wrong views or by outmoded tales that count for nothing. For if we still go on observing Judaism, we admit we never received grace. The divine prophets themselves lived Christ Jesus' way. That is why they were persecuted, for they were inspired by his grace to convince unbelievers that God is one, and that he has revealed himself in his Son Jesus Christ, who is his Word issuing from the silence and who won the complete approval of him who sent him.
Those, then, who lived by ancient practices arrived at a new hope. They ceased to keep the Sabbath and lived by the Lord's Day, on which our life as well as theirs shone forth, thanks to Him and his death, though some deny this. Through this mystery we got our faith, and because of it we stand our ground so as to become disciples of Jesus Christ, our sole teacher.
-Ignatius of Antioch