By this shall all men know that ye are my disciples, if ye have love one to another. John 13:35.
(LHU 298.1)
In this last meeting with His disciples, the great desire which Christ expressed for them was that they might love one another as He had loved them. Again and again He spoke of this. “These things I command you,” He said repeatedly, “that ye love one another.” His very first injunction when alone with them in the upper chamber was “A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another.” To the disciples this commandment was new; for they had not loved one another as Christ had loved them. He saw that new ideas and impulses must control them; that new principles must be practiced by them; through His life and death they were to receive a new conception of love. The command to love one another had a new meaning in the light of His self-sacrifice. The whole work of grace is one continual service of love, of self-denying, self-sacrificing effort. During every hour of Christ’s sojourn upon the earth, the love of God was flowing from Him in irrepressible streams. All who are imbued with His Spirit will love as He loved. The very principle that actuated Christ will actuate them in all their dealing one with another.
(LHU 298.2)
This love is the evidence of their discipleship. “By this shall all men know that ye are my disciples,” said Jesus, “if ye have love one to another.” When men are bound together, not by force or self-interest, but by love, they show the working of an influence that is above every human influence. Where this oneness exists, it is evidence that the image of God is being restored in humanity, that a new principle of life has been implanted. It shows that there is power in the divine nature to withstand the supernatural agencies of evil, and that the grace of God subdues the selfishness inherent in the natural heart.
(LHU 298.3)
This love, manifested in the church, will surely stir the wrath of Satan. Christ did not mark out for His disciples an easy path. “If the world hate you,” He said, “ye know that it hated me before it hated you. If ye were of the world, the world would love his own: but because ye are not of the world, but I have chosen you out of the world, therefore the world hateth you. Remember the word that I said unto you, The servant is not greater than his lord. If they have persecuted me, they will also persecute you; if they have kept my saying, they will keep yours also. But all these things will they do unto you for my name’s sake, because they know not him that sent me.” The gospel is to be carried forward by aggressive warfare, in the midst of opposition, peril, loss, and suffering. But those who do this work are only following in their Master’s steps (The Desire of Ages, 677, 678).
(LHU 298.4)