Famous quotes containing the words optical and/or sound:
“There is an optical illusion about every person we meet.”
—Ralph Waldo Emerson (1803–1882)
“I am afraid that the animals regard man as a creature like themselves which has lost its sound animal wits in a most dangerous way—that they regard him as the deranged animal, as the laughing animal, as the weeping animal, as the unhappy animal.”
—Friedrich Nietzsche (1844–1900)