Isaiah 4 is a part of a book in the Bible called Isaiah. It talks about things that happened a long time ago and things that were going to happen in the future. In Isaiah 4, it talks about a future time when things will be really bad for the people.
It says that there will be lots of bad things happening and not many good things. But it also talks about a time when things will get better. It says that during this time, God will help the people who are in trouble.
It also talks about how important it is to be a good person and to do what is right. It says that if you are good, then good things will happen to you. But if you are bad, then bad things will happen to you.
Overall, Isaiah 4 is a way for people to learn about the past, the present, and the future. It reminds us that even when things are tough, we can still rely on God to take care of us.