It is because of bible and jesus Christ people believe in god because they read the bible and some writers, and prophet draw jesus Christ that this man has a miracle in his hand. He cure all the people that he chose. He talk to all the people the word of god that there is a miracle in this world. And there is a second world if you die.
miracles exist in our civilisation but they last very short, even jesus could resurrect only one person (lazarus) and no other ever anymore,
also jeez made only once time the wine from water and died from thirst, when jesus came from cana after making wine, to his village, the local boys near a well, greeted him: hi, josh, how is the life ... jeshua answered them: haha .. boys, i am as karate fighter, not allowed to use my art and skills overly ...! .sure, bio-energy can cure, of course ... hah ..death is next life ... there we have to wait for another life ... one thing is true, jesus was son of god, ahaha, aren't we all .. one way or other .... if people is almighty god ... or god is the creator of the world in the universe .... !