What are the important differences between the second coming of Christ and the new world era and the present era? Why?

People on earth will lie, fight, swear, insult and slander others, and so on. These are all sins in the eyes of God. The price of sin is death, so everyone has committed a crime. No one can enter the kingdom of heaven without the blood of Jesus Christ and the forgiveness of sins.

Jesus Christ will give people a chance to repent before the second coming, but people are surprised to see that on the day of Jesus' cloud arrival, the door of grace has been closed, that is, there is no chance to repent, and all the dead will be resurrected and accepted a fair and open trial together.

Finally, the righteous go to heaven and the wicked go to hell.

The saints will participate in this trial and rule with Christ for 1000 years. Then God will start to create a new heaven and a new earth. People will live in a new world without sorrow and pain. At that time, they will live in a new world forever, healthy and happy. At the same time, people will not be confined to the earth and can explore the wonders of the universe at will.