Monarchy degenerates into tyranny, aristocracy into oligarchy, and democracy into savage violence and chaos.

From this I conclude that the best education for the situations of actual life consists of the experience we acquire from the study of serious history. For it is history alone which without causing us harm enables us to judge what is the best course in any situation or circumstance.

The common people feel themselves oppressed by the grasping of some, and their vanity is flattered by others. Fired with evil passions, they are no longer willing to submit to control, but demand that everything be subject to their authority. The invariable result is that government assumes the noble names of free and popular, but becomes in fact the most execrable thing, mob rule.

A good general not only sees the way to victory; he also knows when victory is impossible.

If history is deprived of the Truth, we are left with nothing but an idle, unprofitable tale.

Those who know how to win are much more numerous than those who know how to make proper use of their victories.

In our own time the whole of Greece has been subject to a low birth rate and a general decrease of the population, owing to which cities have become deserted and the land has ceased to yield fruit, although there have neither been continuous wars nor epidemics...For as men had fallen into such a state of pretentiousness, avarice, and indolence that they did not wish to marry, or if they married to rear the children born to them, or at most as a rule but one or two of them, so as to leave these in affluence and bring them up to waste their substance, the evil rapidly and insensibly grew.