'Son of God' in the Bible

[But] the person who continues to live a sinful life belongs to the devil, because the devil has continued to sin since the beginning [See Gen. 3]. For this is the reason that the Son of God came [into the world]; it was to destroy the works [i.e., the influence of] the devil [in people's lives].

Whoever proclaims that Jesus is the Son of God, God [continually] lives in that person's heart, and he lives in [fellowship with] God [See 2:23].

And who is the person who can overcome [the evil influence of] the world? [It is] the one who [truly] believes that Jesus is the Son of God.

The person who has the Son [in his heart] possesses this "life;" the one who does not have the Son of God does not possess this "life."

I have written these things to you people, who believe in the name [i.e., in the person and work] of the Son of God, so that you can have assurance that you have [the hope of] never ending life. [See Titus 1:2; 3:7; Mark 10:30].

And [in addition], we know that the Son of God has come [in a physical body, See 4:2] and has given us understanding, so that we can know the True One [i.e., God], and that we are in [fellowship with] the True One, even His Son Jesus Christ. This Son is the true God and eternal life.