"Those who keep the masses of men in subjection by exercising force and cruelty deprive them at once of two vital foods, liberty and obedience; for it is no longer within the power of such masses to accord their inner consent to the authority to which they are subjected. Those who encourage a state of things in which the hope of gain is the principal motive take away from men their obedience, for consent which is its essence is not something which can be sold."