Virtue is Conducted by Truth

The typical nature of the man of perfect virtue is that of having in first place the following of the truth in all of it's aspects and at all cost.

ἀκούωμεν δὴ καὶ λέγωμεν ἐκεῖθεν ἀναμνησθέντες, ὅθεν διῇμεν τὴν φύσιν οἷονἀνάγκη φῦναι τὸν καλόν τε κἀγαθὸν ἐσόμενον. ἡγεῖτο δ᾽ αὐτῷ, εἰ νῷ ἔχεις, πρῶτον μὲν ἀλήθεια, ἣν διώκειναὐτὸν πάντως καὶ πάντῃ ἔδει ἢ ἀλαζόνι ὄντι μηδαμῇ μετεῖναι φιλοσοφίαςἀληθινῆς. Plat. Rep. 6.489e