ὠφελητέος
From LSJ
ψυχῆς πείρατα ἰὼν οὐκ ἂν ἐξεύροιο πᾶσαν ἐπιπορευόμενος ὁδόν· οὕτω βαθὺν λόγον ἔχει → one would never discover the limits of soul, should one traverse every road—so deep a measure does it possess
English (LSJ)
α, ον,
A proper to be served, ὠφελγτέα σοι ἡ πόλις X.Mem.3.6.3. II ὠφελητέον, one must serve, τὴν πόλιν ib.2.1.28.
Greek (Liddell-Scott)
ὠφελητέος: -α, -ον, ῥημ. ἐπίθ., ὃν εἶναι ἀναγκαῖον ἢ πρέπον νὰ βοηθήσῃ τις, ὠφελητέα σοι ἡ πόλις Ξεν. Ἀπομν. 3. 6, 3. ΙΙ. ὠφελητέον, πρέπει τις νὰ βοηθήσῃ ἢ νὰ ὠφελήσῃ, ὠφ. τὴν πόλιν αὐτόθι 2. 1, 28.