The linked article very nicely explains, what blind people (don't) see. I was thinking about this many times, but never came to anything that would really convinced me. I really like the example with the goose, I think this is a way how to explain something you can not really imagine, because you do not have any relevant information that could be used as base for that image.
But imagine telling a goose (who doesn’t know much about humans) that you can’t sense Earth’s magnetic field. The bird, baffled, asks, “So, what do you sense when you change the direction you’re facing??"