Why all the Greek terms?

The issue, then, did not revolve around whether Christians were going engage the wider culture, thereby choosing either to separate from it or capitulate to it. Rather, for Christianity to have emerged in the context that it did meant that philosophical terms, sensibilities, and inclinations of the time period were appropriated by those Christians who wished to pursue public accounts of their identities as Christians.—Pentecostalism as a Christian Mystical Tradition, page 59