Brothers, I write no new commandment to you, but an old commandment which you had from the beginning. The old commandment is the word which you heard from the beginning.
Jesus said, "This is the commandment that I give unto you, that ye love one another" ( John 13:34-35 ). I can say, "Oh yes, I have His commandments, He told me to love one another," and yet, you hate everybody. You see, having the commandment isn't enough. How can I know that I know Him? If I keep His commandment!