Canst thou say (δυνασα λεγειν). Here Matthew 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.