"What light is to the eyes --
what air is to the lungs --
what love is to the heart,
liberty is to the soul of man.
Without liberty, the brain is a dungeon,
where the chained thoughts die with their pinions
pressed against the hingeless doors."
Robert G. Ingersoll
(1833-1899) American lawyer, Civil War veteran, political leader, orator of United States during the Golden Age of Free Thought, nicknamed "The Great Agnostic"
Lecture, 14 May 1866