Delusion 1: You do NOT know what others are thinking.
OK, our life experience, and what we know about what we would think, may give us some indication of what others might be thinking, but even so, we are still probably wrong about what they are actually thinking. They may be thinking something entirely different to what we think they are thinking, and even if they are thinking what we think they are thinking, they are probably thinking it less so. People with anxiety tend to exaggerate and catastrophize things.
For example, I am 198cm tall and quite sensitive about my height. If I walk into a room full of strangers I can tell myself they are all thinking, "Coo, isn't he tall!" But they might be thinking about the other cute people in the room, or about what they are going to have for dinner, or whether the meeting will finish in time in order for them to pick up their children. They might notice my height and admire it rather than be astonished by it. They might notice it for a nano second and then move on to something else. They might not notice it. And even if they notice it, so what? (See "Reducing Anxiety with a Parrot" above.)
What other people think about us is their concern, not ours, and we are usually not as important to them as we think we are.
Delusion 2: You CANNOT know what others are going to do.
Not only do we not know what others are thinking, but we cannot predict what others are going to do, or how they may react. They may be indifferent, and not hostile in the way we are fearing. They may actually be positive. And even if they are hostile, provided we haven't done anything wrong (walk into a room, for example), then their reaction is their choice and responsibility, and not ours.
A counsellor can help us focus more on what we are actually responsible for, rather than what we think we are responsible for.
What do you think?