Of the Creed sent by the Eastern Bishops to those in Italy, called the Lengthy Creed
'We have been compelled, since the publication of our former epitome, to give this more ample exposition of the creed; not in order to gratify a vain ambition, but to clear ourselves from all strange suspicion respecting our faith which may exist among those who are ignorant of our real sentiments. And that the inhabitants of the West may both be aware of the shameless misrepresentations of the heterodox party; and also know the ecclesiastical opinion of the Eastern bishops concerning Christ, confirmed by the unwrested testimony of the divinely-inspired Scriptures, among all those of unperverted minds.'
Source: Ecclesiastical History (New Advent)