Thucydides

Be convinced that to be happy means to be free and that to be free means to be brave. Therefore do not take lightly the perils of war.

Men naturally despise those who court them, but respect those who do not give way to them.

Men's indignation, it seems, is more excited by legal wrong than by violent wrong the first looks like being cheated by an equal, the second like being compelled by a superior.

Ignorance is bold and knowledge reserved.

History is Philosophy teaching by example.

The secret to happiness is freedom... And the secret to freedom is courage.

Wars spring from unseen and generally insignificant causes, the first outbreak being often but an explosion of anger.