KJV:
Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God.
NASB:
Whoever confesses that Jesus is the Son of God, God abides in him, and he in God.
KJV:
Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?
NASB:
Who is the one who overcomes the world, but he who believes that Jesus is the Son of God?
KJV:
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.
NASB:
If we receive the testimony of men, the testimony of God is greater; for the testimony of God is this, that He has testified concerning His Son.
KJV:
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.
NASB:
The one who believes in the Son of God has the testimony in himself; the one who does not believe God has made Him a liar, because he has not believed in the testimony that God has given concerning His Son.
KJV:
And this is the record, that God hath given to us eternal life, and this life is in his Son.
NASB:
And the testimony is this, that God has given us eternal life, and this life is in His Son.
KJV:
He that hath the Son hath life; and he that hath not the Son of God hath not life.
NASB:
He who has the Son has the life; he who does not have the Son of God does not have the life.
KJV:
These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God.
NASB:
These things I have written to you who believe in the name of the Son of God, so that you may know that you have eternal life.
KJV:
And we know that the Son of God is come, and hath given us an understanding, that we may know him that is true, and we are in him that is true, even in his Son Jesus Christ. This is the true God, and eternal life.
NASB:
And we know that the Son of God has come, and has given us understanding so that we may know Him who is true; and we are in Him who is true, in His Son Jesus Christ. This is the true God and eternal life.