" you know you never know how much you use things, till you don't have 'em. And eyes, too. Did you ever think what a lot you do with eyes? I didn't till I went to the Sanatorium. There was a lady there who had just got blind the year before. I tried to get her to play the game—finding something to be glad about, you know—but she said she couldn't; and if I wanted to know why, I might tie up my eyes with my handkerchief for just one hour. And I did. It was awful. Did you ever try it? "
― Eleanor H. Porter , Pollyanna Grows Up (Pollyanna #2)