WIST

History is Philosophy teaching by examples.

Thucydides (c. 460-400 BC) Greek historian
Ars Rhetorica, quoted by Dionysius of Halicarnasus, ch. 11

Happiness depends on being free, and freedom depends on being courageous.

Thucydides (c. 460-400 BC) Greek historian
History of the Peloponnesian War

Words had to change their ordinary meaning and to take that which was now given them. Reckless audacity came to be considered the courage of a loyal ally; prudent hesitation, specious cowardice; moderation was held to be a cloak for unmanliness; ability to see all sides of a question, inaptness to act on any. Frantic violence became the attribute of manliness; cautious plotting, a justifiable means of self-defence. The advocate of extreme measures was always trustworthy; his opponent a man to be suspected. To succeed in a plot was to have a shrewd head, to divine a plot a still shrewder; but to try to provide against having to do either was to break up your party and to be afraid of your adversaries.

Thucydides (c. 460-400 BC) Greek historian
History of the Peloponnesian War, Book 3, 82 [tr. Crawley, Wick (1982)]

Be convinced that to be happy means to be free and that to be free means to be brave.

Thucydides (c. 460-400 BC) Greek historian
The Speeches of Pericles, “The Funeral Speech” [tr. Edinger (1979)

Alt trans.: "The secret of happiness is freedom, and the secret of freedom is courage."