“I am more afraid of our own mistakes than of our enemies’ designs.”

Pericles (Greek Statesman, Orator & General) in a speech to the Athenian Ecclesia I, 432 B.C.

Reference

Jowett, B. (1900) Pericles To The Athenian Ecclesia I. Thucydides: The Jowett Translation. Available from World Wide Web: http://www.classicpersuasion.org/pw/thucydides/thucydides-passages.php?pleaseget=1.140-1.144&passageid=Pericles%20To%20The%20Athenian%20Ecclesia%20I. [Accessed: 31 July, 2016].