This book is dedicated to the Hard Core (they know who they are), and to certain revered and not-so-revered ancestors of the author (they don’t know who they are, for they are dead; but they’d know if they ever got their hands on this book).
Any one who has common sense will remember that the bewilderments of the eyes are of two kinds, and arise from two causes, either from coming out of the light or from going into the light. . and he who remembers this when he sees any one whose vision is perplexed and weak, will not be too ready to laugh; he will first ask whether that soul of man has come out of the brighter life, and is unable to see because unaccustomed to the dark, or having turned from darkness to the day is dazzled by excess of light.