κατορθωτέον
From LSJ
κοινὴ γὰρ ἡ τύχη καὶ τὸ μέλλον ἀόρατον → fortune is common to all, the future is unknown | fortune is common to all and the future unknown | fate is common to all and the future unknown
English (LSJ)
A one must correctly estimate, Ptol. Tetr.193. 2 one must set dislocated limbs, Paul.Aeg.6.120.