Explore "Touch and Sight" by Leo Tolstoy on Textopian. Read with annotations and highlights.
Twist the forefinger over the middle finger and touch a small ball with them, so that it may roll between the two fingers, and shut your eyes. You will think that there are two balls. Open your eyes, -- and you will see that it is one ball. The fingers have deceived you, but the eyes correct you.
Look (best of all sidewise) at a good, clean mirror, -- you will think that it is a window or a door, and that there is something behind it. Touch it with a finger, -- and you will see that it is a mirror. The eyes have deceived you, but the fingers correct you.