not sure why you're bringing up Isaiah 57, but there are very obvious connections between it and the book of Habakkuk. judgement for spiritual prostitution. not sure why a person able to boast of such amazing understanding and authority to teach, who considers and keeps "all" of God's word ((see Romans 2:17-24)), could fail to see how they are connected.
probably it is too marvelous for an idiot like post 
interesting verse here at the end of Isaiah 57, though, with connection to the thread topic:
But the wicked are like the tossing sea,
which cannot rest,
whose waves cast up mire and mud.
(Isaiah 57:20)
no ability to enter rest. like the tossing sea.
this is connected to this:
Then we will no longer be infants, tossed back and forth by the waves, and blown here and there by every wind of teaching and by the cunning and craftiness of people in their deceitful scheming. Instead, speaking the truth in love, we will grow to become in every respect the mature body of him who is the head, that is, Christ.
(Ephesians 4:14-15)
in which tossing about by wind is spoken of being remedied by speaking the truth in love -- which is a stark contrast to veiled curses, deceitful speech and idle slander, biting, and devouring.
in connection to this also, we have:
Or take ships as an example. Although they are so large and are driven by strong winds, they are steered by a very small rudder wherever the pilot wants to go.
(James 3:4)
James is speaking about the tongue, how that it is a restless ((v.8)) evil full of poison, and that no man can tame it. how that out of the same mouth blessing and cursing should not come.
so i find a thread in the scripture connecting an inability to enter rest to false, unloving speech, to wickedness and deceitful teaching. continuing in Ephesians i see it connected to having lost connection with the Head: who is Christ. losing connection to this Head is also spoken of here:
These are a shadow of the things that were to come; the reality, however, is found in Christ. Do not let anyone who delights in false humility and the worship of angels disqualify you. Such a person also goes into great detail about what they have seen; they are puffed up with idle notions by their unspiritual mind. They have lost connection with the head, from whom the whole body, supported and held together by its ligaments and sinews, grows as God causes it to grow.
(Colossians 2:17-19)
where the scripture relates having lost connection to Christ with, now that the substance is revealed, judging others over shadows, associating such behaviour with being vain, unspiritual & having a false show of humility expressed in demanding strict observance of commandments and proscriptions having to do with the physical body and material regulations of conduct.
these things are connected to inability to enter rest.
in Hebrews we see how that the Law of the Mosaic covenant provided similarly for atonement in a way that could not afford the priesthood opportunity to rest. but ultimately God says they did not enter His rest because of unbelief -- it was not failure to keep the outward signs of the diet and feasts and festivals and sabbaths for which they did not enter Canaan, but because they did not trust God to deliver them.
so inability to enter rest is connected to these things:
- wickedness
- vain speech
- lack of love
- deceitful teaching
- judging others over shadows
- unbelief
- lack of trust
but whoever has ceased from his own work has entered His rest: the just shall live by faith.
the manna has been gathered; today's portion was given yesterday.
Yes, my soul, find rest in God;
my hope comes from Him.
Truly He is my Rock and my Salvation;
He is my Fortress, I will not be shaken.
My salvation and my honor depend on God;
He is my Mighty Rock, my Refuge.
Trust in Him at all times, you people;
pour out your hearts to Him,
for God is our Refuge.
(Psalm 65:5-8)
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