Though the mountains be shaken and the hills be removed, yet my unfailing love for you will not be shaken

Isaiah  54:01-17
“Do not be afraid; you will not be put to shame. Do not fear disgrace; you will not be humiliated. You will forget the shame of your youth and remember no more the reproach of your widowhood.
For your Maker is your husband— the Lord Almighty is his name—the Holy One of Israel is your Redeemer; he is called the God of all the earth.
“For a brief moment I abandoned you, but with deep compassion I will bring you back.  In a surge of anger I hid my face from you for a moment, but with everlasting kindness I will have compassion on you,” says the Lord your Redeemer.
Though the mountains be shaken and the hills be removed, yet my unfailing love for you will not be shaken nor my covenant of peace be removed,” says the Lord, who has compassion on you.
No weapon forged against you will prevail, and you will refute every tongue that accuses you. This is the heritage of the servants of the Lord, and this is their vindication(表白) from me,” declares the Lord.
God pledges himself in tender, unswerving, enduring love to his people. Though 'mountains and hills may crumble' God's love for them will never end. In peace and security the foundations of a new and dazzling city are laid.
Why?
God pledges himself to his people, Do not be afraid, you will not be put to shame. 
Even there was brief moment God let them suffered, but with deep compassion God will being them back. It is let people know that He is the Lord who loves them.
God's love is unfailing love and I will not be shaken. Stand on the rock of salvation of Jesus Christ.
To be God's servants will heritage all good from the Lord.
How great the promise from the Lord, " You will forget the shame of your youth and remember no more the reproach of your widowhood."
How?
God has the unfailing love to me, so do not be afraid, I will not be put to shame. My Lord is my heavenly father.