If I'm to pass some sort of exam on what it "means to be a Christian," theology and belief aren't relevant to the test. What is relevant is what Genie and my children can tell you about what I'm like to live with, and whether my years spent on a sacramental path have made me less of a self-centered idiot. That is what faith in God is about, just as that is what being a moral atheist is about.
-Frank Schaeffer, Patience With God (page 44)
Put another way:
If I speak in the tongues of men and of angels, but have not love, I am only a resounding gong or a clanging cymbal. If I have the gift of prophecy and can fathom all mysteries and all knowledge, and if I have a faith that can move mountains, but have not love, I am nothing. If I give all I possess to the poor and surrender my body to the flames, but have not love, I gain nothing. (1 Cor. 13:1-3)