But if your eye be evil, your whole body shall be full of darkness. If therefore the light that is in you be darkness, how great is that darkness!
All Commentaries on Matthew 6:23 Go To Matthew 6
Gregory The Dialogist
AD 604
Mor., xxviii, 11: Otherwise; if the light that “is in thee,” that is, if what we have begun to do well, we overcloud with evil purpose, when we do things which we know to be in themselves evil, “how great is the darkness!”