It is any form of DENIAL, which actually PREVENTS you from being consciously aware of something that has been repressed.
That means that while the block remains, it is not merely a matter of you having to deal with "what you believe" consciously, it's actually about how you are USING this belief in order to HIDE something else that is OUTSIDE of your conscious awareness. Something that you DO NOT BELIEVE IS THERE.
You implemented the block by covering it over with something. This made the thing UNCONSCIOUS to you. Therefore you do not think it exists. You then think that you are in a state of FULL AWARENESS, and that if you do not SEE or are not aware of something in you, it does NOT EXIST. But this is not true.
The block to awareness has MADE the problem unconscious, outside of your awareness, and so you do NOT see it and do not therefore FIND it when you look around you. Thus you think it is not there.
This is why buried underneath DENIAL, there is stuff like unconscious guilt and unconscious sin, lurking in the depths of darkness or unawareness, blocked from sight on purpose, so that you will KEEP IT and not undo it.
Literally, "out of sight, out of mind." or "Swept under the carpet".
This is why fixing blocks to awareness is NOT just the taking back of projections. Projections are just displacements of material, usually coming FROM the unconscious content, but experienced consciously as external or separate from you. That's what the denial MADE HAPPEN.
The block to awareness ITSELF *IS* the layer of denial which has MADE the problem unconscious to you. Everything which supports that denial KEEPS the problem in the dark and beyond your ability to be conscious of it. Blocks of denial must be questioned and undone to REVEAL the unconscious hidden hates and secret sins, otherwise you are dealing only with what you THINK are the problems in your mind while simultaneously AVOIDING the deeper problems you did not want to look at. It was by not wanting to look at the problem that you MADE it unconscious so that you could PRETEND it is not there.
Blocks to awareness LITERALLY BLOCK AWARENESS. Until they are removed, AWARENESS has not been increased. But once they are removed, awareness HAS increased, and you have woken up to more of what you are.