Date: September 10, 1836

"Nevertheless, far different from the deaf and dumb nature around them, these all rest like fountain-pipes on the unfathomed sea of thought and virtue whereto they alone, of all organizations, are the entrances."

— Emerson, Ralph Waldo (1803-1882)

Date: March 11, 2011

"The huge submerged bulk of the mental iceberg, with its stores of memory and acquired skills that have become automatic, like language, driving and etiquette, supplies people with the raw materials on which they can exercise their reason and decide what to think and what to do."

— Nagel, Thomas (b. 1937)