'Eternal Life' in the Bible

(and the life has been manifested, and we have seen, and bear witness, and report to you the eternal life, which was with the Father, and has been manifested to us:)

Every one that hates his brother is a murderer, and ye know that no murderer has eternal life abiding in him.

And this is the witness, that God has given to us eternal life; and this life is in his Son.

These things have I written to you that ye may know that ye have eternal life who believe on the name of the Son of God.

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.