James 5:12 teaches that Christians should simply say "yes" or "no" without making oaths or vows to emphasize their words. The passage condemns casual oath-taking but does not prohibit all oaths, as seen when God and Jesus made vows. It aims to prevent Christians from flippantly invoking God's name. To obey, one must be a person of commitment who thinks carefully before promising, a person of integrity who says no to wrongdoing, and a responsible person who keeps commitments even when difficult.