Here's a different way of describing this.
There is a forgiven world out there, a happy dream, which is beautiful and peaceful and forgiven. It has no guilt in it. There is no threat in it. There is no danger in it. It has no power to do anything to anyone. A beautiful mirage.
When you see this forgiven world, there is absolutely no perceived cause for fear. There are no enemies. Nobody is seen as against you. You are not in any way disempowered. You are simply happy and confident and free. There is no cause outside of you. You don't see sin in anyone. Everyone and everything seems to be for you, not against you.
In such a perception of the world, you can't have any grounds for fear. The real world is harmless. You will feel profoundly at peace because nothing real can be threatened. You will feel completely confident and empowered because nothing will seem to be threatening to take away your power. And you will not be giving away your power.
But also the reason you will not be ABLE to be afraid when you are experiencing the forgiven world, is that your mind will not have any attack content in it. You will only see the forgiven world WHEN your mind is free of attack, and has realized that it was actually attacking itself. When it's taken back its power and has stopped taking its own power away, it won't be able to experience or USE fear to attack itself.
And coupled with clearly perceiving the world as it IS, which is a forgiven world of innocence, you won't be able to distort perception and will not be able to see a world that threatens you. Not because it is really a threat, but because you believe and perceive it is. So if you don't believe it you won't perceive it. Projection makes perception, so don't project attack and don't attack yourself in the first place.
As it says above, the real world cannot be perceived except through the eyes forgiveness blesses. So once your mind has forgiven itself, or rather, has undone its self attack, it will perceive the real world properly rather than a world of darkness and danger. The darkness and danger will not be in the mind so it will not be perceived, and will not interfere with perception.
The 'witnesses to fear', are your false perceptions which are based on your self-attack, which force you to perceive causes for the fear outside of you, seeming to 'make you' afraid, but really this fear is coming from inside you.
When you aren't attacking yourself you will not see these witnesses, and cannot be afraid. You literally will experience invulnerability.
There is no real cause for alarm.