The ego is what formed at the separation. It is the false belief that we are a separate entity, walled off from other people and from God. As a result, it is the belief that we are fundamentally alone and on our own.
“The ego is the belief of the mind that it is completely on its own. “CE T-4.IV.5:5
THE EGOIC CYCLE: Anger —\> Attack —\> Sin —\> Guilt —\> Fear —\> punishment —\> sickness & calamity —\> death
Whenever you respond to your ego, you will experience guilt, and you will fear punishment. CE T-5.VI.5:1
“Sin is not real” CE W-101.5:2 “guilt is always totally insane” CE T-13.XI.6:3, “Fear is not justified in any form” CE W-240:1.