"Pericles's Funeral Oration" (Ancient Greek: Περικλέους Επιτάφιος) is a famous speech from Thucydides's History of the Peloponnesian War.
Several funeral orations from classical Athens are extant, which seem to corroborate Thucydides's assertion that this was a regular feature of Athenian funerary custom in wartime.
Significantly he begins recounting the speech by saying: "Περικλῆς ὁ Ξανθίππου… ἔλεγε τοιάδε", i.e. "Pericles, son of Xanthippos, spoke like this".
[12] Pericles argues that the speaker of the oration has the impossible task of satisfying the associates of the dead, who would wish that their deeds be magnified, while everyone else might feel jealous and suspect exaggeration.
At this point, however, Pericles departs most dramatically from the example of other Athenian funeral orations and skips over the great martial achievements of Athens' past: "That part of our history which tells of the military achievements which gave us our several possessions, or of the ready valour with which either we or our fathers stemmed the tide of Hellenic or foreign aggression, is a theme too familiar to my hearers for me to dwell upon, and I shall therefore pass it by.
There, far from exercising a jealous surveillance over each other, we do not feel called upon to be angry with our neighbour for doing what he likes..."[15] These lines form the roots of the famous phrase "equal justice under law."
"[17] In the climax of his praise of Athens, Pericles declares: "In short, I say that as a city we are the school of Hellas; while I doubt if the world can produce a man, who, where he has only himself to depend upon, is equal to so many emergencies, and graced by so happy a versatility as the Athenian.
"[18] Finally, Pericles links his praise of the city to the dead Athenians for whom he is speaking, "...for the Athens that I have celebrated is only what the heroism of these and their like have made her...none of these men allowed either wealth with its prospect of future enjoyment to unnerve his spirit, or poverty with its hope of a day of freedom and riches to tempt him to shrink from danger.
[20] He praised Athens for its attributes that stood out amongst their neighbours such as its democracy when he elaborates that trust is justly placed on the citizens rather than relying only on the system and the policy of the city.
[21] He explained that fighting for one's country was a great honour, and that it was like wearing a cloak that concealed any negative implications because his imperfections would be outweighed by his merits as a citizen.
Therefore, he proceeds to point out that the greatest honour and act of valour in Athens is to live and die for freedom of the state Pericles believed was different and more special than any other neighbouring city.
Wills never claims that Lincoln drew on it as a source, though Edward Everett, who delivered a lengthy oration at the same ceremony at Gettysburg, began by describing the "Athenian example".