μαλθακιστέον
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 be remiss, Pl.Alc.1.124d: in pl. μαλθᾰκ-ιστέα, Ar.Nu.727.
Greek (Liddell-Scott)
μαλθακιστέον: ῥηματ. ἐπίθ. τοῦ μαλθακίζομαι, δεῖ μαλθακίζεσθαι, Πλάτ. Ἀλκ. 1. 124D· οὕτω μαλθακιστέα Ἀριστοφ. Νεφ. 727.