John Paul II on 'inculturation'

On the one hand the Gospel message cannot be purely and simply isolated from the culture in which it was first inserted (the biblical world or, more concretely, the cultural milieu in which Jesus of Nazareth lived), nor, without serious loss, from the cultures in which it has already been expressed down the centuries; it does not spring spontaneously from any cultural soil; it has always been transmitted by means of an apostolic dialogue which inevitably becomes part of a certain dialogue of cultures.

--John Paul II
Catechesi Tradendae