Complex sentence: The author of the letter to the Hebrews declared that marriage should be held in honour among all, and early Christians defended the holiness of marriage against the Gnostics and the Antinomians.
Split into simpler sentences: The author of the letter to the Hebrews declared that marriage should be held in honor among all. Early Christians defended the holiness of marriage against the Gnostics and the Antinomians.