you will inevitably fail

From LSJ

ἀναμαρτήτως ζῆν καὶ τοῖς ἄλλοις ἀλύπωςlive in a manner above reproach and without offence to others

Source

English > Greek (Woodhouse Quotes)

οὐκ ἔσθ' ὅπως οὐ κακῶς πράξεις

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