Aristophanes

Just Cause: You are debauched and shameless.
Unjust Cause: You have spoken roses of me.
Just Cause: And a dirty lickspittle.
Unjust Cause: You crown me with lilies.
Just Cause: And a parricide.
Unjust Cause: You don't know that you are sprinkling me with gold.
Just Cause: Certainly not so formerly, but with lead.
Unjust Cause: But now this is an ornament to me.
(tr. Hickie 1853, vol. 1, Perseus - for comparison with tr. below)

Philokleon: Let each man exercise the art he knows.
(tr. Rogers 1909, p. 110)

Pisthetaerus: By words the mind is winged. (tr. unknown, seen in Airpower Journal 1990, and in Macmillan Dictionary of Political Quotations 1993, Google Books Search)

Lysistrata: O women, if we would compel the men to bow to Peace, [...] We must refrain from every depth of love.... Why do you turn your backs? Where are you going? Why do you bite your lips and shake your heads? Why are your faces blanched? Why do you weep?
(tr. Lindsay 1925, Perseus)

Sosias: The love of wine is a good man's failing.
(tr. O'Neill 1938, Perseus)

Philosophy: Why, you Precocious Pederast! You Palpable Pervert!
Sophistry: Pelt me with roses!
Philosophy: You Toadstool! O Cesspool!
Sophistry: Wreath my hairs with lilies!
Philosophy: Why, you Parricide!
Sophistry: Shower me with gold! Look, don't you see I welcome your abuse?
Philosophy: Welcome it, monster? In my day we would have cringed with shame.
Sophistry: Whereas now we're flattered. Times change. The vices of your age are stylish today.
(heavily rewritten and embellished tr. Arrowsmith 1962, p. 70)

Demosthenes: Do you dare to accuse wine of clouding the reason? Quote me more marvellous effects than those of wine. Look! when a man drinks, he is rich, everything he touches succeeds, he gains lawsuits, is happy and helps his friends. Come, bring hither quick a flagon of wine, that I may soak my brain and get an ingenious idea.
(tr. O'Neill 1938, Perseus)

Strepsiades: Vortex reigns, having expelled Zeus.
(tr. Hickie 1853, vol. 1, Perseus)

Chremylus: And what good thing can [Poverty] give us, unless it be burns in the bath, and swarms of brats and old women who cry with hunger, and clouds uncountable of lice, gnats and flies, which hover about the wretch's head, trouble him, awake him and say, “You will be hungry, but get up!” [...]
Poverty: It's not my life that you describe; you are attacking the existence beggars lead. [...] The beggar, whom you have depicted to us, never possesses anything. The poor man lives thriftily and attentive to his work; he has not got too much, but he does not lack what he really needs. [...] But what you don't know is this, that men with me are worth more, both in mind and body, than with [Wealth]. With him they are gouty, big-bellied, heavy of limb and scandalously stout; with me they are thin, wasp-waisted, and terrible to the foe. [...] As for behavior, I will prove to you that modesty dwells with me and insolence with [Wealth]. [...] Look at the orators in our republics; as long as they are poor, both state and people can only praise their uprightness; but once they are fattened on the public funds, they conceive a hatred for justice, plan intrigues against the people and attack the democracy. [...]
Chremylus: Then tell me this, why does all mankind flee from you?
Poverty: Because I make them better. Children do the very same; they flee from the wise counsels of their fathers. So difficult is it to see one's true interest.
(tr. O'Neill 1938, Perseus)

Chorus: Under every stone lurks a politician.
(tr. in Bartlett 1968, p. 91 or Archive.org)

Chorus [of Birds]: Man is a truly cunning creature.
(abridged tr. O'Neill 1938, Perseus)

Strepsiades: But come, by the Earth, is not Zeus, the Olympian, a god?
Socrates: What Zeus? Do not trifle. There is no Zeus.
(tr. Hickie 1853, vol. 1, Perseus)

Chorus: [We] must look beneath every stone, lest it conceal some orator ready to sting us.
(tr. O'Neill 1938, Perseus)

Epops: Come let me see, what shall the name be for our city? [...]
Euelpides: Hence, from the clouds, and these meteoric regions, some all-swelling name.
Pisthetaerus: Would you “Cloud-cuckoo-land?”
(tr. Warter 1830, p. 215)

Praxagora: I want all to have a share of everything and all property to be in common; there will no longer be either rich or poor; [...] I shall begin by making land, money, everything that is private property, common to all. [...]
Blepyrus: But who will till the soil?
Praxagora: The slaves.
(tr. O'Neill 1938, Perseus)

Aeschylus: It is the compelling power of great thoughts and ideas to engender phrases of equal size.
(tr. Dillon 1995, Perseus)

Chorus [leader]: Ye Children of Man! whose life is a span, / Protracted with sorrow from day to day, / Naked and featherless, feeble and querulous, / Sickly, calamitous creatures of clay!
(heavily rewritten tr. Frere 1839, p. 38)

Chorus [speaking for Aristophanes]: Yet I have not been seen frequenting the wrestling school intoxicated with success and trying to seduce young boys; but I took all my theatrical gear and returned straight home. I pained folk but little and caused them much amusement; my conscience rebuked me for nothing. Hence both grown men and youths should be on my side and I likewise invite the bald to give me their votes; for, if I triumph, everyone will say, both at table and at festivals, “Carry this to the bald man, give these cakes to the bald one, do not grudge the poet whose talent shines as bright as his own bare skull the share he deserves.”
(tr. O'Neill 1938, Perseus)

Bdelycleon: It is so that you may know only those who nourish you
(tr. O'Neill 1938, Perseus)

Hierocles: You will never make the crab walk straight.
(tr. O'Neill 1938, Perseus)