Note: subsequent to posting this structure I see that Lund has published a version in “Chiasmus in the New Testament“(1942)! He says, “The whole structure is a series of chiastic couplets (e.g. seeing … see not, hearing … hear not) which are interrupted by two alternating couplets”( He splits B and B’ below each into two units which then do not introvert).
A. Therefore speak I to them in parables:
B. because they seeing see not;
and hearing they hear not, neither do they understand.
C. And in them is fulfilled the prophecy of Esaias, which saith,
D. By hearing ye shall hear, and shall not understand;
E. and seeing ye shall see, and shall not perceive:
F. For this people’s heart is waxed gross,
G. and their ears are dull of hearing,
H. and their eyes they have closed;
lest at any time they should see with their eyes,
G’. and hear with their ears,
F’. and should understand with their heart, and should be con verted, and I should heal them.
E’. But blessed are your eyes, for they see:
D’. and your ears, for they hear.
C’. For verily I say unto you, That many prophets and righteous men have desired
B’. to see those things which ye see, and have not seen them;
and to hear those things which ye hear, and have not heard them.
A’. Hear ye therefore the parable of the sower.