At no point is the contrast between one of John’s tests and its opposite more important for contemporary men and women than the contrast between love and hate. This is so simply because the meaning of love has become so debased in modern culture that practically anyone will claim to have love according to his own definition.
Just as jealousy and hatred in a life indicate that the person involved is of the world and not of the family of God, so also do love and self-sacrifice indicate that such a one has passed out of the world and into God’s family. John therefore turns to an analysis of Christian love, elaborating his statements over against the background of the world’s hatred and murderous designs. In this section he restates and elaborates upon the social test itself, digs deeper into love’s essential nature, and finally suggests two ways in which Christians may show love practically.
Here the continuing contrast between Cain the murderer and Christ the Savior is seen in sharpest focus. Life is the most precious possession anyone has. Cain showed his hate by killing righteous Abel. Jesus revealed His love by sacrificing His own life for those foul creatures of sin He chose to make His brethren.
A second area in which self-sacrifice must be practiced is in the Christian home, particularly in love between a husband and wife. Today’s culture glorifies self-satisfaction. It teaches that if one is not personally and fully gratified in marriage, one has a right to break it off, whatever the cost to the other spouse or to the children. But this is not God’s teaching. God teaches that we must die to self in order that the other person might be fulfilled, for it is only as that happens that we will find the fullness of God’s blessing and personal satisfaction.
To this point much of John’s letter has been given over to developing the three tests by which a person who has become a child of God may know that he truly is a child of God. They are: the moral test, which is righteousness; the social test, which is love; and the doctrinal test, which is the test of truth or of belief in the Lord Jesus Christ as God incarnate. The tests have been developed one by one, but it has been obvious even as John talks about them that they belong together and that each is important.
John begins with a passionate exhortation to his readers to “love one another,” a phrase which is repeated three times in verses 7, 11, and 12. This is his great concern, and the reasons for that concern are given in connection with this threefold repetition. The first reason is that love is of God’s own nature; therefore, Christians are to “love one another.” The second reason concerns God’s gift in Christ; therefore, Christians are to “love one another.” The third reason is God’s present activity in and through His people; for this reason, too, Christians are to “love one another.”
The fact that the Trinity is involved in these statements leads naturally to the second of John’s reasons why Christians must love other Christians. The second reason is God’s gift of Jesus Christ His Son for our salvation.
Yesterday, we concluded by speaking of the first two factors that enable us to measure God’s great love for us in Christ. The final factor is that God gave His Son to die for sinners. As John says, “Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins” (v. 10).
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