We need to first attempt to imagine how difficult a task this was for John. He had to try and describe something that is beyond our limits of experience, and to do that, he was greatly hindered in his description, because he had to use human words that we are able to understand. Think about how difficult this must have been for John.
In some ways, I think what John was trying to do must have been similar to what we would have to do if we were able to somehow speak to a baby, still in the womb of his or her mother. Imagine what it would be to try and explain to this little one what our present world is like – the world outside of the mother’s womb.