God has promised great things for those who believe in Him. Everlasting life, is just the beginning.

For God so loved the world, that he have his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. (John 3:16)

But, as many as received him, to them gave he power to become the sons of God, even to them that believe on his name. (John 1:12)

He that believeth on the Son hath everlasting life: and he that believeth not the Son shall not see life; but the wrath of God abideth on him. (John 3:36)

Verily, verily, I say unto you, He that believeth on me hath everlasting life. (John 6:47)