The matters in dispute with the Arians were vital to the very nature of Christianity; and, as Cardinal Newman put it, the trouble was that at that time the laity tended to be champions of orthodoxy while their bishops (seduced by closeness to imperial power) tended not to be. The further trouble (adds Henry Chadwick) is that the whole thing became tangled up with matters of power, organization and authority, and with cultural differences between East and West. Athanasius was accused of treason and murder, embezzlement and sacrilege. In the fight against him, any weapon would do.

  Arianism taught that the Son was created by the Father and in no way equal to him. This was in many ways a “purer” and more “spiritual” approach to religion, since it did not force God to undergo the undignified experience of being made of meat. Islam is essentially Arian. But Arianism leaves an infinite gap between God and man, and ultimately destroys the Gospel, leaving it either as a fake or as a cruel parody. Only by being orthodox and insisting on the identity of the natures of the Father and the Son and the Spirit can we truly understand the goodness of creation and the love of God, and live according to them. For this reason many extracts from the works of St Athanasius have been adopted as Second Readings in the Office of Readings.