Spirit… borne witness. See BC 9; WCF 18.3; WLC 80; HC 76. The Holy Spirit binds together the eyewitness testimony of the apostle, John, with the fellowship his readers experience as together, they rely on God's love expresses through Jesus
Whoever acknowledges; remains in him - 1 John 4:15-16
whoever acknowledges… remains in him. Up to this point, John has used the word remain (menō) twenty times in the epistle (2:6, 10, 14, 17, 19, 24, 27-28; 3:6, 9, 14, 15, 17, 24, 4:12-13), and now twice more here. Jesus' true disciples are marked by their confession that he is God's Son, and then by how fully they rely on his love. This means they remain or abide in his teaching, they keep his commands (see notes on Jn. 8:31; 15:9-15) in the power of God's Spirit
Whoever Lives in God's Love - 1 John 4:16-21
Whoever Lives in God's Love Need not Fear Punishment. The experience of God's Spirit and glory transforms his people into his image (see notes on Exod. 34:29-35). By making their home in his covenant of loyal love, they can rest in peace, instead of fearing punishment.
Remains in this love - 1 John 4:16
remains in this love. See WCF 2.1; WLC 80. To dwell in God's love is also to practice love for one's fellow believers. On God is love, see note above on 4:8
Confidence on the day of judgment - 1 John 4:17-18
made perfect… day of judgment. See BC 37. In this verse and the next, John makes his third and fourth references to perfection or mature love for God. The first was in 2:5, where obedience made this love perfect, complete or mature. The second was in 4:12, where God's love matures as believers practice their love for one another. This leads to the final perfection of God's love—Christians can face God's final judgment without fear. In his Gospel, John describes Jesus as God's final agent of judgment (see notes on Jn. 5:22, 27, 30; 8:16; 12:31-33). Those who live or abide in him need not fear punishment from him.
First loved us - 1 John 4:19
first loved us. In the OT, God's people learned to show mercy to others from the mercy God demonstrated towards them (see notes on Exod. 13:8; 22:21; Lev. 19:34; Deut. 10:19). As John summarized in 3:16 and again in 4:10, the supreme example and standard of God's love is Jesus' incarnation and atoning death
Liars - 1 John 4:20
liars… seen. Arguing from the lesser or lighter matter to the greater or heavier matter, John points out that any claim of love for the invisible God is inadmissible if the claimant shows no evidence of love for those he sees every day in his community. John states the matter as forcefully as possible: this claimant a liar
Love for one another - 1 John 4:21
commandment. This is a major theme of Jesus' upper room discourse in John's Gospel (see notes on Jn. 13:34-35; 14:15; 15:12-14, 17), and an identifying mark of true disciples. Because of their love for one another, John's readers can be assured of their shared experience of God's love
Believe, Love and Obey Christ - 1 John 5:1-5
God's Children Believe, Love and Obey Christ. In this section, all three marks of Christian identity are pulled tightly together. Faith in Jesus the Messiah appears not only in a true confession, but in love for God and obedience to his commands
The Christ - 1 John 5:1
the Christ. In his gospel, John narrated the signs and sayings of Jesus to show that he was the Messiah (see notes on Jn. 20:31). In this letter, John affirmed this mark of divine kinship, his readers' true confession, that Jesus was the Son of God, who came in the flesh and died for the sins of the whole world (see notes on 2:2; 4:2-3, 15; 5:1, 6-8)