“…there are few things in the world as dangerous as sleepwalkers.”
Prologue.
Invisible Man (1952)
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Ralph Ellison 82
American novelist, literary critic, scholar and writer 1914–1994Related quotes

“There are few things more dangerous than inbred religious certainty.”
Source: God's Problem: How the Bible Fails to Answer Our Most Important Question - Why We Suffer

“Love is the most dangerous thing in the world.”
Interview at PlanetOut.com (2004) http://jennifer-beals.com/media/press/planet_out.html.

“Don't play for safety. It's the most dangerous thing in the world.”
Fortitude (1913)

1960s, Discerning the Signs of History (1964)
Context: There are some things that are as basic and as structural in history, and if we don’t know these things, we are in danger of destroying ourselves and our world. Discerning the signs of history, will tell us first that evil carries the seed of its own destruction. That is just as true as the rising and setting of the sun.