Read this today and was disappointed in the author’s definition of being Agnostic as “The position of being unsure or doubtful whether God exists.”
Agnostics are not "unsure or doubtful whether God exists", they simply don't believe that the subject can be known. That is not the same thing as being "unsure or doubtful". Ultimately the term comes from the Greek word "gnosis"..."knowledge".
An Agnostic would say that the Bible is not a reasoned explanation of the existence of God. It's mythology, no different than Norse/Greek/Roman mythology. They're all the writings of man. In the case of Christianity a mythology sprung from a minor sect of Judaism at that. The Bible is not proof of God.