Christianity
did not arise in a vacuum. The very
first Christians debated with their opponents in a cultural context within
which everyone knew that there is a God and that he had revealed himself
through Moses and the prophets. The
question, given that background, was what to think of Jesus of Nazareth. Hence the earliest apologists were, in
effect, apologists for Christianity as
opposed to Judaism, specifically.
That didn’t last long. As
Christianity spread beyond Judea into the larger Mediterranean world, the
question became whether to accept Christianity as opposed to paganism. Much
less could be taken for granted.
Still, significant
common ground for debate was provided by Greek philosophy. In Book VIII of The City of God, Augustine noted that thinkers in the Neoplatonic
tradition had seen that God is the cause of the existence of the world; had
seen also that only what is beyond the world of material and changeable things
could be God; had understood the distinction between the senses and their
objects on the one hand, and the intellect and its objects on the other, and affirmed
the superiority of the latter; and had affirmed that the highest good is not
the good of the body or even the good of the mind, but to know and imitate God. In short, these pagan thinkers knew some of
the key truths about God, the soul, and the natural law that are available to
unaided human reason. This purely
philosophical knowledge facilitated Augustine’s own conversion to Christianity,
and would provide an intellectual skeleton for the developing tradition of
Christian apologetics and theology.