For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies. (Matthew 15:19, NKJV)
Murder is the outward display of a heart full of malice and hatred. The first recorded murder sprang from the angry heart of Cain, who hated his brother Abel (Genesis 4:4-8; 1 John 3:11-15). While the outward results of hatred versus murder are usually quite different, the sin of hatred is just as evil. “We know that we have passed from death to life, because we love the brethren. He who does not love his brother abides in death. Whoever hates his brother is a murderer, and you know that no murderer has eternal life abiding in him” (1 John 3:14-15). Both the slaying of an innocent person (murder) and hatred of a brother produce spiritual death. Cultivating love for one’s neighbor guards against the sin of hatred as well as the ultimate acting out of that hatred – murder. “Owe no one anything except to love one another, for he who loves another has fulfilled the law. For the commandments, “You shall not commit adultery,” “You shall not murder,” “You shall not steal,” “You shall not bear false witness,” “You shall not covet,” and if there is any other commandment, are all summed up in this saying, namely, “You shall love your neighbor as yourself.” Love does no harm to a neighbor; therefore love is the fulfillment of the law” (Romans 13:8-10).