"That everyone who believes may have eternal life in him."
NIV
In order that everyone who believes in Him [who cleaves to Him, trusts Him, and relies on Him] may not perish, but have eternal life and [actually] live forever!
AMP
That whosoever believeth in him should not perish, but have eternal life.
KJV
As Jesus started on his way, a man ran up to him and fell on his knees before him. "Good teacher," he asked, "what must I do to inherit eternal life?"
NIV
And as He was setting out on His journey, a man ran up and knelt before Him and asked Him, Teacher, [You are essentially and perfectly morally] good, what must I do to inherit eternal life[that is, to partake of eternal salvation in the Messiah's kingdom]?
AMP
And when he was gone forth into the way, there came one running, and kneeled to him, and asked him, Good Master, what shall I do that I may inherit eternal life?
KJV
I write these things to you who believe in the name of the Son of God so that you may know that you have eternal life.
NIV
I write this to you who believe in (adhere to, trust in, and rely on) the name of the Son of God [in the peculiar services and blessings conferred by Him on men], so that you may know [with settled and absolute knowledge] that you [already] have life, yes, eternal life.
AMP
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.
KJV
Just then a man came up to Jesus and asked, "Teacher, what good thing must I do to get eternal life?"
NIV
And behold, there came a man up to Him, saying, Teacher, what excellent and perfectly and essentially good deed must I do to possess eternal life? [Lev. 18:5.]AMP
And, behold, one came and said unto him, Good Master, what good thing shall I do, that I may have eternal life?
KJV
Very truly I tell you, whoever believes has eternal life.
NIV
I assure you, most solemnly I tell you, he who believes in Me [who adheres to, trusts in, relies on, and has faith in Me] has (now possesses) eternal life.
AMP
Verily, verily, I say unto you, He that believeth on me hath everlasting life.
KJV