Mat 5:36. Κεφαλῇ, head) Their sin is still graver who swear by their life or their soul.-μίαν τρίχα λευκὴν ἠ μέλαιναν ποῖησαι, to make one hair [thereof] white or black) The dye of human art is not real whiteness or blackness. Not merely is a single hair, but even the colour of a single hair, beyond the power of man.