Note: in this passage it looks as if the blindness and deafness of the people (v21) is parallel with their rebellious heart (v24) –  this must be a very strong echo of Isaiah 6:10, an indictment the Lord applies to the rulers of his day (Matthew 13:15). 

20 Declare this in the house of Jacob,
and publish it in Judah, saying,

A. 21 Hear now this, O foolish people,
and without understanding;
which have eyes, and see not;
which have ears, and hear not:
22 Fear ye not me? saith the LORD:

B. will ye not tremble at my presence,

i. which have placed the sand for the bound of the sea
by a perpetual decree, that it cannot pass it:

ii. and though the waves thereof toss themselves,
yet can they not prevail;

i’.though they roar,
yet can they not pass over it?

A’.23 But this people hath a revolting and a rebellious heart;
they are revolted and gone.
24 Neither say they in their heart,
Let us now fear the LORD our God, that giveth rain,
both the former and the latter, in his season:
he reserveth unto us the appointed weeks of the harvest.