1. Thou hast done well, in signifying to me the discussion thou hast had with the advocates of Arianism, among whom were certain of the friends of Eusebius, as well as very many of the brethren who hold the doctrine of the Church. I hailed thy vigilance for the love of Christ, which excellently exposed the irreligion of their heresy; while I marvelled at the effrontery which led the Arians, after all the past detection of unsoundness and futility in their arguments, nay, after the general conviction of their extreme perverseness, still to complain like the Jews, “Why did the Fathers at Nicæa use terms not in Scripture, ‘Of the essence’ and ‘One in essence?’” Thou then, as a man of learning, in spite of their subterfuges, didst convict them of talking to no purpose; and they in devising them were but acting suitably to their own evil disposition. For they are as variable and fickle in their sentiments, as chameleons in their colours; and when exposed they look confused, and when questioned they hesitate, and then they lose shame, and betake themselves to evasions. And then, when detected in these, they do not rest till they invent fresh matters which are not, and, according to the Scripture, ‘imagine a vain thing’; and all that they may be constant to their irreligion.