I would take it a step further: Jesus' ethical and moral teachings came from love, for love fulfills the Law. If one is loving others, one is not murdering, stealing, committing adultery - further, one is not even thinking about murdering, coveting, lusting, etc. etc. etc. - the spirituality of the Law.
Christ taught the unattainable apart from His Spirit living in us and producing His Fruit. He magnified the Law - made it even harder to keep, driving us to Grace, to Him - to life being led by His Spirit, not by Law. How is the Law fulfilled? Not by us trying to keep the jots and tittles (which have been made obsolete in Christ and His Perfect, Permanent High Priesthood), but by bearing the Fruit that the Spirit of Christ produces in us, and that only happens as one is led by the Spirit.
"If you are led by the Spirit, you are not under the Law", and "The Fruit of the Spirit is love . . . " Note that it's the Fruit of the Spirit and not the FruitS of the Spirit. Everything after love is a characteristic of love - joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control - compare to 1 Cor. 13 - Love is patient and kind; love does not envy or boast; it is not arrogant or rude. It does not insist on its own way; it is not irritable or resentful; it does not rejoice at wrongdoing, but rejoices with the truth. Love bears all things, believes all things, hopes all things, endures all things. Love never ends.
Ethics and morals have no advantage over the love that Christ produces in and through us.
Soooo much doctrine boils down to and is measured by that simple Truth. Only two laws in the New Covenant: Believe in the One God sent and love one another. Simple.
-JGIG