The Law is Love
Not only does love "keep" the law, not only does love "fulfill" the law, but love is "the fulfilling" of the law. In other words, love not only meets the requirements of the law, it comprehensively defines the requirements of the law. As Jesus summarized it in Matthew 22, love is the foundation of the law. The law is love codified, no more, no less. That should not be a surprise to us who know that the law is a transcript of God's character, and God is love.