Imagine you buy a bookcase in a box. It has instructions for assembly. Sure, the manufacturer has greater knowledge of the precise methods involved, and how they made the wood, etc. But to get to the finished product, you just have to assemble it and don't need that extra know-how. There is a book, in the box (not to put on the shelf), but to read through so that you can properly assemble the book case. Now, if you choose not to follow the instructions, and end up with a hole in the back and 45 shelves, whose fault is that?
If that is the case, where is the instruction book to know god? (Don`t even say the Bible cause that cannot possibly be it)