"For the mountains shall depart, and the hills be removed; but my kindness shall not depart from thee, neither shall the covenant of my peace be removed, saith the LORD that hath mercy on thee." (Isaiah 54:10)
This is an incredible promise for those who believe in Jesus.
Not only will the kindness, the chesed of our Daddy God never leave us, but His covenant, the covenant of HIS peace will never be removed.
That word "remove" is mot, which speaks of decay, shaking away, or falling away, like falling on hard times.
When does this word first appear in the Bible?
"And if thy brother be waxen poor, and fallen in decay with thee; then thou shalt relieve him: yea, though he be a stranger, or a sojourner; that he may live with thee." (Leviticus 25:35)
The first mention of "decay" is in reference to a brother in the nation of Israel who has fallen into great need, who has slipped or faces hard times.
Even under the Old Covenant, God commanded the Israelites to help their fellow Israelite brethren, not to stand far away and do nothing.
Today, we can rest assured that our First of Many Brethren, Jesus Christ (Romans 8:29) will take care of us.
We can rest assured that the Covenant of God's peace will not fall away. It's an unshakable covenant which we cannot break, since the enforcing close does not depend on us!
"10For this is the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people:
"11And they shall not teach every man his neighbour, and every man his brother, saying, Know the Lord: for all shall know me, from the least to the greatest.
"12For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more." (Hebrews 8:10-12)
God the Father has been propitious to our unrighteousness, in that He sent His Son to die for our offenses, and then to be raised for our justification (Romans 4:25)
I don't think Paul the Apostle could have made it clearer:
"For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him." (2 Corinthians 5:21)
We can rest assured that this Covenant of Peace will never decay, never fall away. Jesus fulfilled the Old Covenant, and that is the covenant which decays and falls away (Hebrews 8:13).
Also, notice that God does not assure about any covenant. This the Covenant of His Shalom peace!
His peace, His provision, His protection, His prosperity, His purpose.
And it will never decay or fall away!