What does Romans 6:16 mean?
Paul has made clear that our responsibility as Christians is to use our freedom from the power of sin to stop sinning. Christ has rescued us from slavery to sin. It's not our master any longer.Now, though, Paul shows that we become slaves of whomever we continue to obey. Sin leads to death. Obedience leads to righteousness. We choose which one to obey and become the slave of that one. Paul seems to be showing that we are in an ongoing battle to serve the right master. Our choices matter because we are either contributing to death or to righteousness.
Scripture presents salvation as a moment which saves us from the eternal penalty of sin (Romans 3:21–25), and the enslaving power of sin (Romans 6:7–11). However, it does not make us sinless (1 John 1:9–10). Those who express saving faith in Christ will not live in constant, deliberate sin (Galatians 5:19–24; 1 John 3:6–9), though they will always be subject to temptation and error in this earthly life (1 Corinthians 10:13).