Do people become spiritually attuned and ready for a meeting with God through our own efforts and behaviors, or do we become attuned and in common union (communion) with God through His Spirit and His grace?
It is interesting that you put the "or" separator between the two statements, assuming that it is not an "and" (i.e. need both). A Bible-inerrant believer would argue that there are verses that support each one separately and both together, therefore, it must be both.
P.S. "works" is doing what Jesus asks. That would include evangelicalism, which is what riles-up atheists so much.