It is written in ACIM, "You are afraid to know God's Will, because you believe it is not yours. This belief is your whole sickness and your whole fear."
We, humans, live in fear. There is a low level anxiety about our existence. Something is just not quite right even when we can't identify what it is.
Nadia Bolz-Weber says in her interview with Krista Tippett On Being:
"Well, I think we've sort of glamorized certain types of brokenness. You know, there's like the big ones: mental illness, addiction. And in a way, it can be very tempting to allow those people who are so obviously broken to just carry all the brokenness for us...........................Everyone has something that they - like it might not be a huge addiction, the really kind of big sexy ones, but it might be there's something that we feel powerless over, that we feel like has a hold of us, that we don't feel like we have much choice in, like we've lost the ability to choose whether we're going to do this, or this this, or be in this relationship, and then our life has a certain unmanageability because of that. I think that is very, very, very common, even if you don't have one of the big sexy problems that we sort of identify."
When we fear God's will because it means giving up our identification with our own egos, it causes existential anxiety and we are at odds with ourselves and life. We don't know and don't accept who we really are. We doubt our essential worth and dignity. We are one with God, with Life, whether we want to acknowledge our radical dependence on that fact or not and when we deny it, reject it, are unaware of it, we suffer. When we recognize it, accept it, align or give up our egos to be one with it we are at peace.