Mark Snoeberger helpfully summarizes the essence of what it means to be a “conservative” Christian:
As a self-identifying “conservative,” I mean by the label that I am a foundationalist. That is, I believe that within God’s order are fixed and inalienable standards of right and wrong in the spheres of truth, goodness, beauty, and in fact every philosophical sphere. The standard of right in each case is defined by God and is not subject to progress. So while the world around me experiments continually with alternative universes in which goodness, beauty, and truth are other than what God defines them to be, I refuse to do so on principle, viz., the conservative principle.
Being a conservative is not an easy thing in a world (and sometimes in churches) that embrace progressivism (the opposite of conservatism). But the foundational nature of God’s truth system cannot ultimately survive without it.