Optical Activity

Famous quotes containing the words optical and/or activity:

“There is an optical illusion about every person we meet.”
—Ralph Waldo Emerson (1803–1882)

“Labor is work that leaves no trace behind it when it is finished, or if it does, as in the case of the tilled field, this product of human activity requires still more labor, incessant, tireless labor, to maintain its identity as a “work” of man.”
—Mary McCarthy (1912–1989)