Quotes from work
History of the Peloponnesian War

The History of the Peloponnesian War is a historical account of the Peloponnesian War , which was fought between the Peloponnesian League and the Delian League . It was written by Thucydides, an Athenian historian who also happened to serve as an Athenian general during the war. His account of the conflict is widely considered to be a classic and regarded as one of the earliest scholarly works of history. The History is divided into eight books.

“I am more afraid of our own blunders than of the enemy's devices.”
Book I, Chapter V
History of the Peloponnesian War, Book I

“speculation is carried on in safety, but, when it comes to action, fear causes failure.”
Book I, 1.121-[5]
History of the Peloponnesian War, Book I

Book VIII, 8.89
As quoted in A Historical Commentary on Thucydides: A Companion to Rex Warner’s Penguin Translation, David Cartwright/Rex Warner, University of Michigan Press (1997), p. 298 : ISBN 0472084194
In the Richard Crawley translation, this quote is rendered as follows : [U]nder a democracy a disappointed candidate accepts his defeat more easily, because he has not the humiliation of being beaten by his equals.
History of the Peloponnesian War, Book VIII

“The secret of happiness is freedom and the secret of freedom is courage.”
Book II, 2.43
History of the Peloponnesian War, Book II