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φρονεῖν μέγα

Ὀίκοι μένειν δεῖ τὸν καλῶς εὐδαίμονα → The person who is well satisfied should stay at home.
Aeschylus, fr. 317

Greek > English (Woodhouse Phrases Reversed)

φρονεῖν μέγα = be arrogant, be inflated, be proud, be puffed up, be vain, give oneself airs, pride oneself on, swell with pride

⇢ Look up "φρονεῖν μέγα" on Google | LSJ full text search (Translation based on the reversal of Woodhouse's English to Ancient Greek dictionary)