Verse Comparison: 1 John 5:20
American Standard Version
And we know that the Son of God is come, and hath given us an understanding, that we 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.
Amplified® Bible
And we [have seen and] know [positively] that the Son of God has [actually] come to this world and has given us understanding {and} insight [progressively] to perceive (recognize) {and} come to know better {and} more clearly Him Who is true; and we are in Him Who is true--in His Son Jesus Christ (the Messiah). This [Man] is the true God and Life eternal.
Darby English Version
And we know that the Son of God has come, and has given us an understanding that we should know him that [is] true; and we are in him that [is] true, in his Son Jesus Christ. He is the true God and eternal life.
International Standard Version
We also know that the Son of God has come and has given us understanding so that we may know the true God. We are in union with the one who is true, his Son Jesus Christ. He is the true God and eternal life.
King James Version
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.
Young's Literal Translation