I have a brother who has never been able to hear well. We learned some sign language and he has had to wear hearing aids since he was three or four when we found out about his hearing. To watch what he has had to go through, how different his perception of the world is, it's insightful. You never quite get it though, unless you've had to walk in that person's shoes.
When I was a child we used to play a game called blind man. In this game, you blindfold someone and spin them around. Then you tell them to find a certain room or object. But even playing this game doesn't give you a real idea of how people who can't see live. This is because you always know you have the ability to peak if you get really really lost. You always know you can take the blindfold off.
I had an aunt who lost her sight. She was my favorite of all Granny's sisters because she was an artist, like me. I used to look at her art work and marvel. Someday, I would do that. Then one day she gave me a lot of her art supplies because she was losing her sight to something called (and I hope I'm spelling it right) macular degeneration. Then, not too long ago, I saw a blurry spot one day. Probably caused by the horrible migraine I was experiencing. But it scared me. I became increasingly worried that I, like my aunt, would one day be unable to see.
But seeing other people go through something -- even if it's someone close to you -- and going through it yourself are two highly different things. You never understand, you never comprehend, you just don't know what it's like. And you live day to day taking all these things for granted. Most of us don't get up each morning and thank the Creator for the things we have and are able to do. We just take them for granted unless or until we lose them.