Everything this side of the separation from God functions according to ego laws. These laws are always linear and exclusive. The ego "thinks" in terms of exclusive logic/reasoning and draws conclusions based on exclusion, because exclusion is separation.
Everything on the other side of the separation - God, heaven, self, sonship, creation etc, always functions according to God's laws. These laws are always holographic and inclusive. This is not only a different system of thought its also an entirely different WAY of thinking.
The two "worlds" or systems function on entirely different rules, entirely different flows of thought, entirely different ways of thinking and reasoning, and they are totally different to each other.
Using ego-based thinking or reasoning to try to grasp the nature of what is beyond the ego is inherently a bad idea. it cannot go there, and is guaranteed to mis-perceive, mis-interpret, and mis-undestand everything to do with heaven.
When the ego thought system is used to interpret the nature of heaven or God or his creation, it is guaranteed to fail. It cannot see God correctly or clearly. It sees separations where there are none. It sees unity where there are natural divisions. It can only accept part of the truth and not all of it, because the ego is fundamentally a system of exclusion and partiality.
We need a different way of thinking if we are to understand the nature of God and his creation, or to draw any conclusions about what Jesus means when he discusses it. We have to learn to think in an entirely different, non-excluding way, the kind of way that God thinks, if we're to have any hope of accurately appreciating his nature.
A large majority of the logical reasoning in ACIM uses exclusive logic, because it's the ego's language and what the ego can for the most part accept and understand. It "sees sense" in it, and so the Course very cleverly speaks the ego's language and uses its system of reasoning to lead it OUT of its own thought system. Kind of genius.
But at times, Jesus also speaks about heaven and God and creation, God's son and so on, sometimes using ego logic and sometimes using God's logic. God's logic is extremely different and not natural to the ego. It takes some getting used to. Certain parts of the course will either make no sense, or you will come to "nonsense", when trying to use the ego's logic to understand them. Unfortunately pretty much EVERY course student has used the ego's logic to describe and interpret Jesus's statements about God's nature, and this has produced tremendous misunderstanding.