φρονητέον
From LSJ
κρείσσων ἐναρχόμενος βοηθῶν καρδίᾳ τοῦ ἐπαγγελλομένου καὶ εἰς ἐλπίδα ἄγοντος· δένδρον γὰρ ζωῆς ἐπιθυμία ἀγαθή (Proverbs 13.12 LXX) → One who sincerely sets about helping is better than one who makes promises leading to hope; for a kindly urge is a tree of life.
English (LSJ)
A one must think, ἐπί τινι μέγα φ. one must pride oneself on . . X.HG2.4.40; μεῖζον φ. Id.Ages.8.4; μεῖον Id.Ap.26.