Isaiah 57: Despite many problems in Israel, the Lord is merciful and changes hearts.

 In Isaiah 57 we see the problems in Israel. The first problem was his leaders in final of Isaiah 56, the second problem is idolatry in Isaiah 57:3-13 which is called adultery and prostitution.

3
But you—come here,
    you children of witches,
        you descendants of adulterers and prostitutes!

 
5 You burn with lust under oak trees
    and under every large tree.
    You slaughter children in the valleys
    and under the cracks in the rocks.
6
Your idols are among the smooth stones in the ravine.
    They are your destiny.
    You have given them wine offerings
    and sacrificed grain offerings to them.
    Do you think I am pleased with all this?

7
You’ve made your bed on a high and lofty mountain.
    You’ve gone to offer sacrifices there.
8
You’ve set up your idols beside doors and doorposts.
    You’ve uncovered yourself to the idols.
    You’ve distanced yourself from me.
    You’ve made your bed with them.
    You’ve made a deal with those you have pleasure with in bed.
    You’ve seen them naked.

Does this behavior brings satisfaction? No:

10
You’ve tired yourself out with many journeys.
    You didn’t think that it was hopeless.
    You’ve found renewed strength,
    so you didn’t faint.

However, in 14-21, we see the Lord changing the hearts of his people:

15
The High and Lofty One lives forever, and his name is holy.

This is what he says:

I live in a high and holy place.
    But I am with those who are crushed and humble.
        I will renew the spirit of those who are humble
            and the courage of those who are crushed.
16
I will not accuse you forever.
    I will not be angry with you forever.
    Otherwise, the spirits, the lives of those I’ve made,
        would grow faint in my presence.

The Lord is merciful: He will no accuse me forever otherwise, my life would grow faint in His presence.

17
I was angry because of their sinful greed,
    so I punished them, hid from them, and remained angry.
        But they continued to be sinful.
18
I’ve seen their sinful ways, but I’ll heal them.
    I’ll guide them and give them rest.
    I’ll comfort them and their mourners.
19
I’ll create praise on their lips:
    “Perfect peace to those both far and near.”
    “I’ll heal them,” says Yahweh.

May the Lord heal me, comfort me, guide me, give me rest and create praise on my lips.
In contrast, this chapters talks about the wicked at the end:


20
But the wicked are like the churning sea.
    It isn’t quiet,
        and its water throws up mud and slime.

21
“There is no peace for the wicked,” says my Elohim.

The wicked doesn't find peace, satisfaction in the Lord.