Go to read the work of Josh McDowell. He used to be an agnostic who researched the evidence and became a Christian. http://www.impactchristianbooks.com/products.asp?Submit=GO!&Author=mcdowell
All our knowledge comes from experiences that we record in books. All knowledge is contained in a book. I challenge anyone to research the New Testament Manuscripts for validaty and consistency compared to any other relied upon work of antiquity. you will be amazed how superior the scripture stack.
If you are going to trust any other important works such as Plato, Shakespeare or Homer you have to trust the New Testament manuscripts when you scientifically scrutinize the preservation methods for these antique works.