εἰς πέλαγος σπέρµα βαλεῖν καὶ γράµµατα γράψαι ἀµφότερος µόχθος τε κενὸς καὶ πρᾶξις ἄκαρπος → throwing seeds and writing letters at sea are both a vain and fruitless endeavor
sure: P. and V. βέβαιος, ἀσφαλής, V. ἔμπεδος; see steadfast.
unchanging: P. μόνιμος, ἀμετάπτωτος.
frequent: P. and V. πυκνός, Ar. and P. συχνός.
continuous: P. συνεχής, ἐνδελεχής.
incessant: V. διατελής, P. ἄπαυστος.
