History of the Peloponnesian War

Either then some means of terror more terrible than this must be discovered, or it must be owned that this restraint is useless; and that as long as poverty gives men the courage of necessity, or plenty fills them with the ambition which belongs to insolence and pride, and the other conditions of life remain each under the thraldom of some fatal and master passion, so long will the impulse never be wanting to drive men into danger.

Hope also and cupidity, the one leading and the other following, the one conceiving the attempt, the other suggesting the facility of succeeding, cause the widest ruin, and, although invisible agents, are far stronger than the dangers that are seen.

Fortune, too, powerfully helps the delusion, and by the unexpected aid that she sometimes lends, tempts men to venture with inferior means; and this is especially the case with communities, because the stakes played for are the highest, freedom or empire, and, when all are acting together, each man irrationally magnifies his own capacity.

In fine, it is impossible to prevent, and only great simplicity can hope to prevent, human nature doing what it has once set its mind upon, by force of law or by any other deterrent force whatsoever.

We must not, therefore, commit ourselves to a false policy through a belief in the efficacy of the punishment of death, or exclude rebels from the hope of repentance and an early atonement of their error.