"And this is love: that we walk in obedience to His commands. As you heard from the beginning, His command is that you walk in love." (II John 1:6 - II John has no "3:16")
The apostle John wrote this short book of the Bible. the second in a series of three letters he wrote to fellow-believers to emphasize truth and love and to warn them about false teachings. The book of II John is a letter about love. The love of God. The Bible is a love story; it is the most intricate, beautiful love story you will ever read. The more you read and study it, the more details will be revealed to you. It is a love letter from God to you.
Love is what each of us wants and needs. Our world is filled with words about love - greeting cards, popular music, magazines - they fill us with dreams of love and give us ideas of some sort of perfect romance. But, this rarely exists. We long for love. We yearn to love and be loved, but see very few examples of real love living in our world today. Christ is the direct opposite of the world's ways, the opposite of the world's values. Christ is the opposite of the self-centered world we live in. Believers in Him need to claim His ideals, reflecting love and acting with love toward one another.
So, the command to walk in love is both old and new. In the Bible the old foreshadows the new and the new reflects back to the old. In the above quote, Jesus is referring to the book of Deuteronomy wherein God gave mankind instructions on how to live in love... the Torah and the commandments.
The apostle Paul wrote beautifully of love in his first letter to the Corinthians:
Love is patient, love is kind. It does not envy, it does not boast, it is not proud. It is not rude, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoices with the truth. It always protects, always trusts, always hopes, always perseveres.
Love never fails...When I was a child, I talked like a child, I thought like a child, I reasoned like a child. When I became a man, I put childish ways behind me. Now we see but a poor reflection as in a mirror; then we shall see face to face. Now I know in part; then I shall know fully, even as I am fully known.
And now these three remain: faith, hope, and love. But the greatest of these is love." (I Corinthians 13:1-13)
Love God. Then, love one another. This is walking in love.