When the copulation of stories was penned for what we know as the Bible. There wasn't one. The spreading of Christianity was done by word of mouth. The interest in one God, Christ and the followers of Christ came with time. The actual accounts of Jesus, his miracles. His death. All written about years later. So the burning question "What does it take for me to know God"? Belief that something other then man controls this world. A spirit that grows close to the unseen, the unheard. Being aware of those gentle nudges (instinct, sixth sense) in the right direction, away from evil and self destruction. A feeling that is indescribable. Reading the bible to see what took place back then may help in understanding who God is and what he can do for you. It seems ironic that not having the bible as a reference in the early days allowed the people to simply believe.
Immediately the father of the child cried out and said, “I believe; help my unbelief!”