By this shall all men know that you are my disciples, if you have love one for another.
He that loveth his brother, abideth in the light, and there is no scandal in him.
That they all may be one, as thou, Father, in me, and I in thee; that they also may be one in us; that the world may believe that thou hast sent me.
But he that keepeth his word, in him in very deed the charity of God is perfected; and by this we know that we are in him.
And now I beseech thee, lady, not as writing a new commandment to thee, but that which we have had from the beginning, that we love one another.