Every question contains fear. Knowledge is a state of total certainty, in which there is nothing to ask, no questions, no doubts, no fear. When you have knowledge, there is no basis for needing to ask anything.
When you don't have knowledge, due to a denial of knowledge, you enter into a state of lack. Here, knowledge is missing, so you now have a basis of "needing" to ask questions. The questions are part of seeking for what seems to be missing, trying to make sense of what is now confusing.
This means you have gone into fear. Fear is uncertainty. Knowledge is certainty. Without knowledge you must be afraid. Something becomes "unknown", leaving an open door for possibilities, imagined monsters, unexpected threats and things you cannot predict. Instantly you are in fear because you are uncertain.
There is a spiritual self-help idea of "questioning everything". Now, what's important to realize is NOT everything should be questioned. What should be questioned is anything to do with questions. Because questions are fear, and that is ego. So you should be questioning whether the fear is true, whether you really need to ask the question, and why you have blocked knowledge.
But if you are asking any other kind of question, which is based on the assumption that knowledge is denied, an entire world has arisen from ignorance, a universe of fear is in front of your eyes, and now you are asking questions about it... those kind of questions are not helpful. "What is it?" "What is happening?" "What is causing it" etc are all based in the assumption that a world of doubt is happening, inspiring questions.
You could continue being in a state of fear and questioning for a very long time, asking a billion questions, and not becoming any more certain. In fact many ego questions are designed merely to maintain fear, keep you searching, distract you from knowledge, and send you on a very long wild goose chase "not finding" any real sense of answer, certainty, clarity or knowledge. Questions that take you away from the TRUE answer, are not really helpful.
The only answer to all questions is God. Only the truth is true. The true answer is there is no question. In knowledge of the Kingdom nothing is missing or lacking or unknown or absent. All is known. And so there is no fear, because there is no uncertainty. There is also nothing to learn, so no questions to ask in an attempt to learn. When you are learning, you are really moving away from the truth, UNLESS you are learning the Unreality of your doubts and fears.
If you use questioning to unravel false questions, then this is helpful. If you are being radically honest for example, going within and finding out the deeper truth through a kind of inquiry, that's great. If it's moving you out of fear into certainty, great. If it's moving you away from ignorance toward knowledge, great. But if it's moving you outward away from yourself, away from peace and certainty, and you're becoming lost in doubt and not knowing and worry and fear and terror, which turns into stress and desperation, then you're asking ego-affirming questions instead of ego-dissolving questions.
"I have no question, I forgot what to decide".
"I know nothing"
These are important elements of the course's approach. It's not that you must know nothing. In fact, you must become reunited with knowledge and know everything! But the stuff that you THINK you know, but which is NOT really knowledge, has to be identified as NOT real knowledge. It's fake ego knowledge. It's great to recognize you don't REALLY know that things are going to work out badly - you are just speculating. It's good to drop your past learning, your self-taught lies, your false beliefs, your made-up rules, your justifications and so on... to make room for ACTUAL knowledge.
Ego knowledge always goes hand in hand with not knowing, and so always entails uncertainty, and therefore fear.
"The intrusion of the ability to perceive, which is inherently judgmental, was introduced only after the Separation. No one has been sure of anything since then."
Even true perception is not knowledge. Nor is it wholly certain. It is fundamentally unstable. It can be stabilized to seem to align with certainty but it is not fundamentally certain. All perception is a separated state, and anyone still perceiving still needs healing. Only when perception is gone can there be knowledge. And that means the body must go as well, because the body is the device you made to perceiving with. "Indeed, you cannot remain in this world with this knowledge."
The world you made is a world of fear, a world of lies, and a world of uncertainty. Nothing in it can really be known. It's all made up bullshit. Questioning its reality is useful, but asking questions about what, why, how, when, where such and such is happening IN it, is just the ego going down the rabbit hole. The form of a question seeming to be a question, but really being a desire to fear and NOT KNOW the answer. The answer is in the Holy Spirit. Ask Him the truth.
"The ego will demand many answers that this course does not give. It does not recognize as questions the mere form of a question to which an answer is impossible. The ego may ask, "How did the impossible occur?", "To what did the impossible happen?", and may ask this in many forms. Yet there is no answer; only an experience. Seek only this, and do not let theology delay you."