ταῦτ' ἐπίστω καὶ γράφου φρενῶν ἔσω
From LSJ
ἔσῃ γὰρ ὡς πετεινοῦ ἀνιπταμένου νεοσσὸς ἀφῃρημένος → for you will be as a nestling taken away from a bird that is flying
English > Greek (Woodhouse Quotes Reversed)
know this and inscribe it on your mind, know this and record it in your mind