[Every] hour of delay abates the fame and force of the invader, and multiplies the resources of defensive war.

The mathematics are distinguished by a particular privilege, that is, in the course of ages, they may always advance and can never recede.

The urgent consideration of the public safety may undoubtedly authorize the violation of every positive law. How far that or any other consideration may operate to dissolve the natural obligations of humanity and justice, is a doctrine of which I still desire to remain ignorant.

The barbarians of Germany had felt, and still dreaded, the arms of the young Caesar; his soldiers were the companions of his victory; the grateful provincials enjoyed the blessings of his reign; but the favourites, who had opposed his elevation, were offended by his virtues; and they justly considered the friend of the people as the enemy of the court.

The decline of Rome was the natural and inevitable effect of immoderate greatness. Prosperity ripened the principle of decay; the cause of the destruction multiplied with the extent of conquest; and, as soon as time or accident and removed the artificial supports, the stupendous fabric yielded to the pressure of its own weight. The story of the ruin is simple and obvious: and instead of inquiring why the Roman Empire was destroyed we should rather be surprised that it has subsisted for so long.

The authority of Plato and Aristotle, of Zeno and Epicurus, still reigned in the schools; and their systems, transmitted with blind deference from one generation of disciples to another, precluded every generous attempt to exercise the powers, or enlarge the limits, of the human mind.

[The] emperor of the West, the feeble and dissolute Valentinian, [had] reached his thirty-fifth year without attaining the age of reason or courage.