يوحنا الأولى ٥:١٧

"Every unrighteousness (even that of believers, compare Jo1 1:9; Jo1 3:4. Every coming short of right) is sin"; (but) not every sin is the sin unto death. and there is a sin not unto death--in the case of which, therefore, believers may intercede. Death and life stand in correlative opposition (Jo1 5:11-13). The sin unto death must be one tending "towards" (so the Greek), and so resulting in, death. ALFORD makes it to be an appreciable ACT of sin, namely, the denying Jesus to be the Christ, the Son of God (in contrast to confess this truth, Jo1 5:1, Jo1 5:5), Jo1 2:19, Jo1 2:22; Jo1 4:2-3; Jo1 5:10. Such wilful deniers of Christ are not to be received into one's house, or wished "God speed." Still, I think with BENGEL, not merely the act, but also the state of apostasy accompanying the act, is included--a "state of soul in which faith, love, and hope, in short, the new life, is extinguished. The chief commandment is faith and love. Therefore, the chief sin is that by which faith and love are destroyed. In the former case is life; in the latter, death. As long as it is not evident (see on Jo1 5:16, on 'see') that it is a sin unto death, it is lawful to pray. But when it is deliberate rejection of grace, and the man puts from him life thereby, how can others procure for him life?" Contrast Jam 5:14-18. Compare Mat 12:31-32 as to the wilful rejection of Christ, and resistance to the Holy Ghost's plain testimony to Him as the divine Messiah. Jesus, on the cross, pleaded only for those who KNEW NOT what they were doing in crucifying Him, not for those wilfully resisting grace and knowledge. If we pray for the impenitent, it must be with humble reference of the matter to God's will, not with the intercessory request which we should offer for a brother when erring.

In this chapter the apostle asserts, I. The dignity of believers (Jo1 5:1). II. Their obligation to love, and the trial of it (Jo1 5:1-3). III. Their victory (Jo1 5:4, Jo1 5:5). IV. The credibility and confirmation of their faith (Jo1 5:6-10). V. The advantage of their faith in eternal life (Jo1 5:11-13). VI. The audience of their prayers, unless for those who have sinned unto death (Jo1 5:14-17). VII. The preservation from sin and Satan (Jo1 5:18). VIII. Their happy distinction from the world (Jo1 5:19). IX. Their true knowledge of God (Jo1 5:20), upon which they must depart from idols (Jo1 5:21).

5:17 not every sin leads to death: Those sins that do not involve ultimate apostasy can end in repentance and restoration (see Jas 5:20).