Paradoxically, to enforce the law of good is to destroy it. Paradoxically, the freedom to do evil — as long as it does not violate the right — is required for the freedom to do good. The law of right is at its center the law of freedom, and is thus, paradoxically again, the only thing for which one can rightly resort to coercion and war. All of this is not to say that the law of good must bottle itself up within the individual and the closed community, and render itself impotent. Instead it means that the law of good must win the world the hard way, by the noncoercive means of persuasion, gifts, and the marketplace — must win the population one by one by one. And it can only do so under the wing of the law of right.
via Instapundit