At the time, the word philosophy did not call to mind an esoteric discipline in which students are taught substantial doses of skepticism and not much constructive content. In the ancient world, philosophy meant something like what we mean by “worldview.” Various teachers taught competing worldviews, and Christians earnestly sought to evangelize men and women who held these diverse pagan worldviews.
–D.A. Carson and Douglas J. Moo, An Introduction to the New Testament, 2nd. ed. (Grand Rapids: Zondervan, 2005), 33.