Optical Activity

Famous quotes containing the words optical and/or activity:

“People who have realized that this is a dream imagine that it is easy to wake up, and are angry with those who continue sleeping, not considering that the whole world that environs them does not permit them to wake. Life proceeds as a series of optical illusions, artificial needs and imaginary sensations.”
—Alexander Herzen (1812–1870)

“Humour is by far the most significant activity of the human brain.”
—Edward De Bono (b. 1933)