There was only one major difference between Paul's Christianity and the pagan corpus, and that it involved the sanctity of the self. Apparently, the cabals in Britain, Rome, and Jerusalem, that commissioned Paul were determined to decimate the pagan philosophy that considered man as his own savior.
You (Pagans) say we [Christians] worship the sun; so do you.
To the ordinary public - notwithstanding the immense amount of work which has of late been done on this subject - the connection between Paganism and Christianity still seems rather remote. Indeed the common notion is that Christianity was really a miraculous interposition and that the pagan gods...fled away in dismay before the sign of the Cross, and at the sound of the name of Jesus. Doubtless this was a view much encouraged by the early Church itself - if only to enhance its own authority and importance; yet...it is quite misleading and contrary to fact. The main Christian doctrines and festivals, besides a great mass of affiliated legend and ceremonial, are really quite directly derived from, and related to, preceding Nature worships; and it has only been by a good deal of deliberate mystification and falsification that this derivation has been kept out of sight.
Whether Jesus lived or not, we may conclude with certainty that Christianity is of pagan origin. December the 25th is celebrated as the birthday of Jesus Christ. This date is an approximation of the Winter Solstice, and the birthday of several pagan sun-gods. Its pagan derivation is beyond all dispute.
The greatest of Jewish scholars, those who have thoroughly analyzed the ancient Jewish scriptures and who have expert knowledge concerning the origins of Christianity, understand Christianity to be akin to the mystery religions of the ancient pagan world and to the Gnostic traditions that orthodox Judaism ostensibly frowns upon. It was these pagan mystery traditions that advocated sun-gods, dying saviors, and divine salvation, and not Judaism. These facts have been guilefully obscured by latter-day elites within the Roman Catholic (and Protestant) churches who have a great deal to lose should the pagan roots of their "heavenly" Jesus be revealed.
Ammonius Saccas (a Greek philosopher, founder of the Neoplatonic School) taught that Christianity and Paganism, when rightly understood, differ in no essential points, but had a common origin, and are really one and the same religion.
Hypatia not only proved conclusively the pagan origin of the Christian faith but also exposed the purported miracles then advanced by the Christians as tokens of divine preference by demonstrating the natural laws controlling the phenomena.