6. Being then refuted by the clear example of the Apostle and by his writings, the heretics yet endeavour to resist further, and say that their opinion is supported by apostolic authority, bringing forward the passage in the Epistle to the Hebrews: “For it is impossible that those who were once enlightened, and have tasted the heavenly gift, and have been made partakers of the Holy Spirit, and have tasted the good word of God, and the powers of the world to come, should if they fall away be again renewed unto repentance, crucifying again the Son of God, and put Him to open shame.” Heb. vi. 4–6. The use made by the Montanists and Novatians of this passage in support of their heresy seems to have been one of the reasons why the Epistle to the Hebrews was so late in being received as canonical. This is stated by one authority in so many words: “Epistola ad Hebræos non legitur propter Novatianos.” Philastrius, de Hær. 41.