1 JOHN 5:1-13 WITH COMMENTS

[1] Whosoever (Especially you, for God is no respecter of persons - Acts 10:34; Rom. 10:13) believeth (Rom. 10:9-10) that Jesus is the Christ (The Son of the living God - Matt. 16:16) is born of God (Born again - Jn. 3:3-21): and every one that loveth Him that begat (The Father - Acts 13:33) loveth Him (Jesus) also that is begotten (Jn. 3:16) of Him (The Father).
[2] By this we know that we love the children of God, when we love God, and keep His Commandments (His Commandments describe how to love Him and all those who are His. The Commandments of God for the Christian are summed up in Galatians 5:14 which says, "For all the Law is fulfilled in one word, even in this; Thou shalt love thy neighbour as thyself").
[3] For this is the love of God, that we keep His commandments (In other words, we love God by loving others): and His commandments are not grievous (Matt. 11:28-30).
[4] For whatsoever is born of God overcometh the world: and this is the victory that overcometh the world, even our faith (Rev. 2:7, 11, 17, 26; 3:5, 12, 21; 21:7).
[5] Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?
[6] This is He that came by water (Water refers to the flesh - Mk. 14:22; Jn. 3:5-6; 1 Cor. 11:24) and blood (Mk. 14:24; 1 Cor. 11:25), even Jesus Christ; not by water only, but by water and blood. And it is the Spirit that beareth witness, because the Spirit is truth (Jn. 16:13).
[7] For there are three that bear record in heaven, the Father, the Word (Jn. 1:1, 14), and the Holy Ghost: and these three are One (The Holy Trinity - Matt. 28:19; Lk. 3:22; Jn. 14:26; 1 Pet. 1;2; etc.).
[8] And there are three that bear witness in earth, the Spirit, and the water (His flesh), and the blood (His blood): and these three agree in one.
[9] If we receive the witness of men, the witness of God is greater: for this is the witness of God which He hath testified of His Son.
[10] He that believeth on the Son of God hath the witness in himself: he that believeth not God hath made Him a liar; because he believeth not the record that God gave of His Son.
[11] And this is the record, that God hath given to us eternal life, and this life is in His Son.
[12] He that hath the Son hath life; and he that hath not the Son of God hath not life.
[13] These things have I written unto you that believe on the name of the Son of God (1 Jn. 2 repeatedly tells us to whom John wrote; believers of all ages); that ye may know that ye have eternal life (Be absolutely certain that you are saved), and that ye may (continue to) believe on the name of the Son of God.

When we sin and doubts come, remember, we are not believing in ourselves;
we are believing in Jesus Christ, God's only begotten Son!