And which book? I have read most of his stuff but I am always ready to find something new.
Nothing subtle and nothing new. The Kingdom of Christ was not of this world and the Romans only knew of this world -the tangible. Thus whatever Mark wrote was subversive (in speaking about the new Kingdom and new King) and it would not have mattered in which place or time he lived.
It, along with Judaism would never have been accepted.
The everlasting man talks about this point in Christian history where the Romans were perfectly willing to have Apollo = Christ. That even became the official religion of the Empire, thanks to Marcion, but it FAILED.