Romans 13:9 The commandments, “You shall not commit adultery,” “You shall not murder,” “You shall not steal,” “You shall not covet,” and whatever other command there may be, are summed up in this one command: “Love your neighbor as yourself.” 10 Love does no harm to a neighbor. Therefore, love is the fulfillment of the law.
Sound familiar? Take a look at Matthew 22:34-40 and Mark 12:29-31 – these are the very words of the Lord, quoting Leviticus 19:18. I do not think there is any way we can add emphasis to the importance of this command. I was enlightened by Coffman’s commentary on this verse:
The Christian life is realized, not by an item tabulation of commandments kept or broken, but by a conscious filling of the heart with love toward others, a fulfillment being made possible only by the sacred enthronement within, of the Holy Spirit