... Either one is a slave of "sin" or a slave of "obedience."
Paul makes it clear in this "either...or" that there is no "possibility of
neutrality" (Kasemann). One is never "free" from a master, and those
non-Christians who think that they are "free" are under an illusion created and
sustained by Satan. The choice with which people are faced is not "Should
I retain my freedom or give it up and submit to God?" but "Should I serve sin or
should I serve God?"
Again on Romans 6:18, Dodd writes:
... we must remember that Pual's concept of freedom is not that of
autonomouse self-directin but of deliverance from those enslaving powers that
would prevent the human being from becoming what God intended. It is only
by doing God's will and thus knowing his truth that we can be "free