1 John 5:9-13 New Revised Standard Version (NRSV)
9 If we receive human testimony, the testimony of God is greater; for this is the testimony of God that he has testified to his Son. 10 Those who believe in the Son of God have the testimony in their hearts. Those who do not believe in God[a] have made him a liar by not believing in the testimony that God has given concerning his Son. 11 And this is the testimony: God gave us eternal life, and this life is in his Son. 12 Whoever has the Son has life; whoever does not have the Son of God does not have life.
13 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.
1 John 5:9-15 The Message (MSG)
9-10 If we take human testimony at face value, how much more should we be reassured when God gives testimony as he does here, testifying concerning his Son. Whoever believes in the Son of God inwardly confirms God’s testimony. Whoever refuses to believe in effect calls God a liar, refusing to believe God’s own testimony regarding his Son.
11-12 This is the testimony in essence: God gave us eternal life; the life is in his Son. So, whoever has the Son, has life; whoever rejects the Son, rejects life.
The Reality, Not the Illusion
13-15 My purpose in writing is simply this: that you who believe in God’s Son will know beyond the shadow of a doubt that you have eternal life, the reality and not the illusion. And how bold and free we then become in his presence, freely asking according to his will, sure that he’s listening. And if we’re confident that he’s listening, we know that what we’ve asked for is as good as ours.