11 For this is the message that ye heard from the beginning, that we should love one another.
12 Not as Cain, who was of that wicked one, and slew his brother. And wherefore slew he him? Because his own works were evil, and his brother's righteous.
13 Marvel not, my brethren, if the world hate you.
14 We know that we have passed from death unto life, because we love the brethren. He that loveth not his brother abideth in death.
15 Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him.
16 Hereby perceive we the love of God, because he laid down his life for us: and we ought to lay down our lives for the brethren.
17 But whoso hath this world's good, and seeth his brother have need, and shutteth up his bowels of compassion from him, how dwelleth the love of God in him?
18 My little children, let us not love in word, neither in tongue; but in deed and in truth.
19 And hereby we know that we are of the truth, and shall assure our hearts before him.
20 For if our heart condemn us, God is greater than our heart, and knoweth all things.
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The language of the First General Epistle of the apostle and evangelist John is so close to the language of his Gospel that the question of authorship looks completely idle. It is all the more interesting how the beloved disciple uses the Teacher's expressions. In the Gospel the Lord says: "he who believes Him who sent Me has eternal life, and does not come into judgment, but has passed from death into life" (John 5:24). In today's passage from the epistle we read: "we know that we have passed from death into life." We have every right to think that with this Greek expression in both cases the apostle is accurately conveying the words of Christ that he remembered. Why then, as the apostle says, do we know that we have passed from death into life? Because we love the brothers.
To be honest, these words sound somewhat shocking. The turns of history make us think that the reason for confidence in the accomplished passage from death into life lies in other things. Yet for the apostle everything is so simple: we know that we have passed from death into life because we love the brothers. It is even a little painful, because this is precisely what, as a rule, we do not know how to do... At the same time, reading these words is very joyful, because Christianity turns out to be a much more living faith than one might think by looking at ourselves.