What does it postulate?
The course can be summarized as follows, as Jesus says:
Nothing real can be threatened.
Nothing unreal exists.
In this lies the Peace of God.
The explanation: What is real is what God created; what is unreal is what He did not create. And it is because of this that He is at peace.
What did God create? He created His children and nothing else. That is why you are the Kingdom of God.
What did He not create, which for Him does not exist? The world as we see it, your body, animals, plants, and everything else you can think of. The course calls this a dream. You are dreaming a dream. You have fallen asleep. The Bible says that Adam entered a deep sleep, but it does not say that he awoke.
Note: In these texts, you will find words written in capital letters that are written in lowercase in the original book. This is because everything related to creation is written in capital letters, and everything related to dreams is written in lowercase.