“When Arius himself, the author of the heresy, and the associate of Eusebius, was summoned through the interest of Eusebius and his fellows to appear before Constantine Augustus of blessed memory, and was required to present a written declaration of his faith, the wily man wrote one, but kept out of sight the peculiar expressions of his impiety, and pretended, as the Devil did, to quote the simple words of Scripture, just as they are written. And when the blessed Constantine said to him, ‘If thou holdest no other opinions in thy mind besides these, take the Truth to witness for thee; the Lord is thy avenger if thou swearest falsely’: the unfortunate man swore that he held no other, and that he had never either spoken or thought otherwise than as he had now written. But as paying the penalty of his crime, and ‘falling headlong burst asunder in the midst.’ Death, it is true, is the common end of all men, and we ought not to insult the dead, though he be an enemy, for it is uncertain whether the same event may not happen to ourselves before evening. But the end of Arius was not after an ordinary manner, and therefore it deserves to be related. Eusebius and his fellows threatening to bring him into the Church, Alexander, the Bishop of Constantinople, resisted them; but Arius trusted to the violence and menace of Eusebius. It was the Sabbath, and he expected to join communion on the following day. There was therefore a great struggle between them; the others threatening, Alexander praying. But the Lord being judge of t he case, decided against the unjust party: for the sun had not set, when the necessities of nature compelled him to that place, where he fell down, and was forthwith deprived of communion with t he Church and of his life together. The blessed Constantine hearing of this at once, was struck with wonder to find him thus convicted of perjury. And indeed it was then evident to all that the threats of Eusebius and his fellows had proved of no avail, and the hope of Arius had become vain. It was shewn too that the Arian madness was rejected from communion by our Savior both here and in the Church of the first-born in heaven. Now who will wonder to see the unrighteous ambition of these men, whom the Lord has condemned—to see them vindicating the heresy which the Lord has pronounced excommunicate (since He did not suffer its author to enter into the Church), and not fearing that which is written, but attempting impossible things?”
-Athanasius in his letter to the Bishops of Egypt.