Hannah, who was born blind in Korea without eyes, was asked what she thought about before she went to sleep at night. She explained how great her next day was going to be. When asked how she knows the world is a good place, she replied, "In my world, everything sounds so happy..."
You can watch this interaction in a video SBSK did on our family, "A Day In The Life of The Family With Six Blind Kids", here: https://youtu.be/ZVniBmf0uT4
That exchange is at about 31:00 in the video.