Wheat And Weeds

Οἱ γεωργοὶ τὰ συμφόμενα τῷ σίτῳ ζιζάνια ῥιζόθεν ἀνασπῶσιν, ἵνα καθαρὸς ὁ καρπὸς εἰς τὸν ἐμητον ἀπαντήσῃ. Χρὴ τοίνυν καὶ σὲ τὰς ἐπιθολούεας τὸν νοῦν κακίας ἐκτεμεῖν, ἵνα ὑγιὴς ἡ συνείδησις, καὶ παντὸς πάθους ἀμέτοχος, τὴν βρῶσιν τὴν μένουσιν εἰς ζωὴν κατεργάζηται. Ἅγιος Ἰσίδωρος Του Πηλουσιώτου, Βιβλιον Πρῶτον, Ἐπιστολή ΥΛΒ' Κελσῳ Source: Migne PG 78.421a

When the wheat sprouts up farmers tear up the weeds by the root so that pure fruit may come to harvest. You, then, in the same way cut off that which corrupts your soul, that you might be healthy, and apart from every vile attachment make the bread that remains forever. Saint Isidore of Pelusium, Book 1, Letter 432 to Celsus