New Heaven and a New Earth

Isa 65:17  "I am creating a new heaven and a new earth. The troubles of the past will be forgotten. No one will remember them. 
Isa 65:18  My people will be happy and rejoice forever and ever because of what I will make. I will make a Jerusalem that is full of joy, and I will make her people happy. 
Isa 65:19  "Then I will rejoice with Jerusalem. I will be happy with my people. There will never again be crying and sadness in that city. 
Isa 65:20  In that city there will never be a baby who lives only a few days, and every older person will live for a long, long time. A person who lives 100 years will be called young. And whoever doesn't live that long will be considered cursed. 
Isa 65:21  "In that city whoever builds a house will live there; whoever plants a vineyard will eat the grapes from that garden. 
Isa 65:22  Never again will one person build a house and another person live there. Never again will one person plant a garden and another eat the fruit from it. My people will live as long as the trees. My chosen people will get full use of whatever they make. 
Isa 65:23  Never again will a woman suffer childbirth and have her baby die. Women will not fear childbirth. I, the LORD, will bless all my people and their children. 
Isa 65:24  I will answer them before they call for help. I will help them before they finish asking. 
Isa 65:25  Wolves and little lambs will eat together. Lions will eat hay like cattle, and snakes will eat only dust. They will not hurt or destroy each other on my holy mountain." This is what the LORD said. 

Isaiah speaks of the Millennium and beyond to when there will be a New Jerusalem come down as an eternal dwelling place for the Lord and his people. Earth will be restored and a new earth and a new heaven will be made. We do not know the details. Jesus makes all things new.

2Co 5:17  Therefore, if anyone is in Christ, he is a new creation. The old has passed away; behold, the new has come.

He has given us his inheritance and it will be wonderful.

1Co 2:9  But, as it is written, "What no eye has seen, nor ear heard, nor the heart of man imagined, what God has prepared for those who love him"—

Rom 8:16  The Spirit himself bears witness with our spirit that we are children of God, 
Rom 8:17  and if children, then heirs—heirs of God and fellow heirs with Christ, provided we suffer with him in order that we may also be glorified with him. 
Rom 8:18  For I consider that the sufferings of this present time are not worth comparing with the glory that is to be revealed to us. 
Rom 8:19  For the creation waits with eager longing for the revealing of the sons of God. 
Rom 8:20  For the creation was subjected to futility, not willingly, but because of him who subjected it, in hope 
Rom 8:21  that the creation itself will be set free from its bondage to corruption and obtain the freedom of the glory of the children of God. 
Rom 8:22  For we know that the whole creation has been groaning together in the pains of childbirth until now. 
Rom 8:23  And not only the creation, but we ourselves, who have the firstfruits of the Spirit, groan inwardly as we wait eagerly for adoption as sons, the redemption of our bodies. 

What was promised will come about, so do not give up hope.