From Erich Fromm, On Disobedience (nearly every line of this book so far is worth quoting):
In order to disobey, one must have the courage to be alone, to err and to sin. But courage is not enough. The capacity for courage depends on a person’s state of development. Only if a person has emerged from mother’s lap and father’s commands, only if he has emerged as a fully developed individual and thus has acquired the capacity to think and feel for himself, only then can he have the courage to say “no” to power, to disobey.
A person can become free through acts of disobedience by learning to say no to power. But not only is the capacity for disobedience the condition for freedom; freedom is also the condition for disobedience. If I am afraid of freedom, I cannot dare to say “no,” I cannot have the courage to be disobedient. Indeed, freedom and the capacity for disobedience are inseparable; hence any social, political, and religious system which proclaims freedom, yet stamps out disobedience, cannot speak the truth.