For who can rule men if not he who holds their conscience and their bread in his hands?
 Fyodor Dostoyevsky, The Brothers Karamazov (1880). copy citation

Context

“The great conquerors, Timours and Ghenghis-Khans, whirled like hurricanes over the face of the earth striving to subdue its people, and they too were but the unconscious expression of the same craving for universal unity. Hadst Thou taken the world and Cæsar's purple, Thou wouldst have founded the universal state and have given universal peace. For who can rule men if not he who holds their conscience and their bread in his hands? We have taken the sword of Cæsar, and in taking it, of course, have rejected Thee and followed him. Oh, ages are yet to come of the confusion of free thought, of their science and cannibalism. For having begun to build their tower of Babel without us, they will end, of course, with cannibalism.” source