1 John 5:11-13  And this is the testimony: that God has given us eternal life, and this life is in His Son. He who has the Son has life; he who does not have the Son of God does not have life. These things I have written to you who believe in the name of the Son of God, that you may know that you have eternal life, and that you may continue to believe in the name of the Son of God.
 

1 John 4:9
In this the love of God was manifested toward us, that God has sent His only begotton Son into the world, that we might live through Him.