How does Paul apply love fulfilling the law to the moral commandments?
Paul reasons that because love fulfills the law, believers refrain from stealing, adultery, false witness, and idolatry; he also cites honoring parents in Ephesians as the first commandment with promise. He applies love to nine of the Ten Commandments, noticeably omitting the Sabbath command, which he never mentions.
Les explains that the Sabbath command was under the law and was incorporated into it, though it existed before the law. He notes that Paul refers to the Ten Commandments throughout his letters, but the Sabbath command is the only one Paul never mentions. Instead, Paul says that since the law is fulfilled with love, therefore we do not steal, do not commit adultery, and do not bear false witness. It follows naturally that we do not have idols and do not make idols. In Ephesians, Paul also mentions honoring parents as the first commandment of promise. So Paul references nine of the commandments, but the tenth—the Sabbath—is glaringly absent, separating believers from the legal system.