1 John 5:10-12

He who believes in the SON of GOD has the testimony in him; he who does not believe - GOD has made him a liar, because he has not believed the testimony that GOD himself gave concerning his SON. The testimony is that GOD gave us eternal life, and eternal life is in his SON. He who has the SON has eternal life. He who does not have the SON of GOD does not have eternal life.