A.T. Robertson Commentary Luke 6:42

"Or how canst thou say to thy brother, Brother, let me cast out the mote that is in thine eye, when thou thyself beholdest not the beam that is in thine own eye? Thou hypocrite, cast out first the beam out of thine own eye, and then shalt thou see clearly to cast out the mote that is in thy brother`s eye." — Luke 6:42 (ASV)

Canst thou say (δυνασα λεγειν). Here Mt 7:4 has

wilt thou say (ερεις).

Beholdest not (ου βλεπων). Matthew 7:4 has "lo" (ιδου).

Thou hypocrite (υποκριτα). Contrast to the studied politeness of "brother" (αδελφε) above. Powerful picture of blind self-complacence and incompetence, the keyword to argument here.