γεωμέτρητος μηδες εσίτω
Ageōmetrētos mēdeis eisitō.
"Let no-one without knowledge of geometry enter". Motto over the entrance to Plato's Academy
Λιβύη φέρει τι κακόν / καινόν
Aei Libyē pherei ti kakon / kainon.
"Libya always bears something evil / new", Aristotle, Historia Animalium. (Cf. Latin Ex Africa semper aliquid novi, "From Africa always something new".)
εκολοις παρ κολοι ζάνει
Aei koloios para koloiōi hizanei.
"A jackdaw is always found near a jackdaw", i.e. "birds of a feather flock together."
Ἀεὶ ὁ θεὸς γεωμετρεῖ
Aei ho theos geōmetrei.
"Always god geometrizes", Plato
Ἀεὶ ὁ θεὸς ὁ μέγας γεωμετρεῖ τό σύμπαν
Aei ho theos ho megas geōmetrei to sumpan.
"Always the great god applies geometry to everything", A mnemonic for π (pi); Ἀεί =3, ὁ=1, θεός=4, ὁ=1, μέγας=5, γεωμετρεῖ=9,τό=2, σύμπαν=6
Ἀετοῦ γῆρας, κορυδοῦ νεότης
Aëtou gēras, korudou neotēs.
"An eagle's old age (is worth) a sparrow's youth".
νάγκ δ’οδ θεο μάχονται
Anankāi d'oude theoi machontai.
"Even the Gods do not fight necessity", Simonides, 8, 20.
νθρωπος μέτρον
Anthrōpos metron.
"Man the measure (of all things)", motto of Protagoras.
παξ λεγόμενον
Hapax legomenon.
"Once said", i.e. a word that only occurs once in a text or body of literature.
πμηχανς Θεός
Apo mēchanēs Theos
Deus ex machina
ριστον μνδωρ
Ariston men hudōr.
"Greatest however is water", Pindar, Olymp. 1, 1. Used as the inscription over the Pump Room at Bath.
Ββ
b
Βρῶμα θεῶν
Brōma theōn.
"Food of the gods" — allegedly said by Nero of the poisoned mushrooms with which his mother Agrippina the younger murdered Claudius.
http://en.wikipedia.org/wiki/List_of_Greek_phrases