Why does anything at all exist?
It may be hard to believe that God exists because he is not seen, but the existence of God, an all powerful, eternal, immaterial creative being, is the best explanation to the existence of anything.
Science comes from the Latin word scientia, meaning 'knowledge.' Science is the method in which we collect and organize knowledge about the universe through observation and experiment. From observation, we know that everything that begins to exist has a cause. If you believe this universe came from nothing, how come we haven't observed anything else come from nothing?
We also know from observation that the universe is expanding and therefore, has a beginning (Thomas Hubble). If the universe consists of all time space and matter, the cause must come from an all powerful, eternal, immaterial being which describes the God of the Bible.
How do we know the Bible is true?
To validate the claim that the Bible is truly the word of God, there must be sure evidence of it. Could God authenticate his message to us? Besides the internal consistency, historical and archeological accuracy, the Bible has fulfilled prophecies that never fail, and codes in the original texts that show beyond a shadow of a doubt that the text is supernaturally inspired:
It is unique and wonderful that our Christian heritage is the bedrock of western freedom to believe or disbelieve. However, that doesn't mean that the scriptures are only true for those who believe. Truth is true wether you believe it or not. This truth--that there is a God and it is the triune God found in the Bible-- is prophetically, logically, historically and mathematically proven beyond a shadow of a doubt. Grasping this truth is so important that your eternal destiny depends on it. God didn't create hell for people, he created it for the devil and his angels. People go to hell for willfully choosing to reject God and his truth.
*Just as a side note, we do not need to understand any bible code to understand the Bible or that it is divinely inspired. There is more than enough evidence in creation to know that there is a God and his word is verified through prophecy.