Why do people say life is a blessing, why do you believe in Heaven/God?

I believe in God for many reasons. One because of all the science in the bible. Jeremiah 33:22 (written 2500 years ago) "As the host of heaven cannot be numbered, neither the sand of the sea measured." The Bible claimed that there are billions of stars (host of heaven is the biblical term for the stars) When it made this statement no one knew how vast the numbers of stars were as only about 1,100 were observable. Now we know that there are billions of stars, and they cannot be numbered. There are so many of these facts.