Harold J. Laski: “Locke saw that vigilance is the sister of liberty, where Hobbes dismissed the one as faction and the other as disorder.”

To deny novelty or grievance a right of expression is a certain, if, indeed, an ultimate, validation of the truth they contain.

He is able, accordingly, to indulge in the twofold luxury not only of preserving his own authority, but also of assisting the persons attacked to enter, if they so choose, the way of truth.

Ultimately, that denial is always made upon the same ground: it is insisted that the doctrines or practices attacked are subversive of the civil order.

When attacks on liberty are political or economic, it is their motive rather than their nature that changes.