By this shall all men know that you are my disciples, if you have love one to another.
That they all may be one; as you, Father, are in me, and I in you, that they also may be one in us: that the world may believe that you have sent me.
He that loves his brother abides in the light, and there is no occasion of stumbling in him.
But whoever keeps his word, in him verily is the love of God perfected: by this we know that we are in him.
And now I beseech you, lady, not as though I wrote a new commandment unto you, but that which we had from the beginning, that we love one another.