How do you describe a sense to someone born without it?

How do you describe “sight” to a blind person? I’m not blind and don’t know anyone who is, but I have to assume that words like light, dark, color, see, look, watch, view, bright, .... are all meaningless. And those are what I would instinctively try to use.

Same goes for explaining “hearing” to someone who’s deaf. Sound, noise, hear, etc are nonsensical.

So if a blind person asked you to describe what it means to see, what would you tell him?