John 3:3 Jesus answered and said unto him, Verily, verily, I say unto thee, except a man be born again, he cannot see the kingdom of God.

John 3:16  For God so loved the world, that He gave His only begotten Son, that whosoever believes in Him should not perish, but have everlasting life.

1 John 5:13 These things have I written unto you that believes on the Name of the Son of God; that you may KNOW that you have eternal life, and that you may believe on the Name of the Son of God. (Jesus)