““Every morning, looking into the mirror, you will find your visage reflected in it just as it was on the preceding day; so also every morning, looking at the sun and the earth, you will find them reflected in your retina just as they were on the previous morning; but the sun and the earth are no less changeless than you. Why do the sun and the earth seem changeless and constant to you? Only because you yourself undergo change more quickly than they.””