Relatively little survives of the writings of some early Christian heresiarchs apart from quotations preserved by their critics and, in some cases there is serious doubt as to whether the heresies with which their names are associated reflect what they actually taught and wrote. In the case of Nestorius it is now clear that he was not a "nestorian" in the classical sense of the word.
^Rowan Williams writes: "We have only a handful of texts that can be confidently treated as giving us Arius' own thinking in his own words, apart from these we are wholly dependent upon the reports of his enemies" (Williams, Rowan. Arius SCM:2001 p.95)
^"'Arianism' as a coherent system, founded by a single great figure and sustained by his disciples is a fantasy" (Williams, Rowan. Arius SCM:2001 p.82)
^Kelly, J. N. D. (1965). Early Christian Doctrines (3rd ed.). London: A&C Black. p. 316.