The power in society which has any tendency to convert itself into political power is not power quiescent, power merely passive, but active power
 John Stuart Mill, Considerations on Representative Government (1861). copy citation

Context

“though, no doubt, a government so situated is in the condition called in mechanics unstable equilibrium, like a thing balanced on its smaller end, which, if once disturbed, tends more and more to depart from, instead of reverting to, its previous state. But there are still stronger objections to this theory of government in the terms in which it is usually stated. The power in society which has any tendency to convert itself into political power is not power quiescent, power merely passive, but active power; in other words, power actually exerted; that is to say, a very small portion of all the power in existence. Politically speaking, a great part of all power consists in will. How is it possible, then, to compute the elements of political power, while we omit from the computation any thing which acts on the will?” source