Impossible! Watch out for yourself! That's the only way to survive! But, is that really survival? I don't think so. I would rather be ripped off for loving someone than be hard and "survive."
The Christian is called to give, to die to self, to be like Christ—after all, that's what "Christian" means in Greek. I fail to see how one can embrace the current societal system and claim to be Christian. Society certainly doesn't endorse any of the values expounded in the above passage; society says watch out for number one. The Christian has a different number one, though...