By thy head. — This is apparently chosen as an extreme instance of a common oath in which men found no reference to God. Yet here, too, nothing but an implied reference to Him fits it to be an oath at all. He made us, and not we ourselves, and the hairs of our head are not only numbered, but are subject in all their changes to His laws, and not to our volition.
Related Commentaries of Matthew 5:36
Matthew 5:36
36 Neither shalt thou swear by thy head, because thou canst not make one hair white or black.