Thanks Heb and Bell, you both make good points. Maybe, I don't 'believe in myself', Heb, and I don't know how I'm going to do that either. Thanks for that. It is food for thought.
Bell, yes, I do think I am more intelligent than my colleagues, or if not more intelligent, then certainly some fundamental thing which puts me in a different 'level' to them, as you say. What bothers me is that all types of people, whether highly intelligent or unintelligent, seem to be able to co-exist, yet I don't seem to be able to. I really struggle and it bothers me that other intelligent people seem to manage it. For example, many intellectuals come from, and have survived, humble beginnings, co-existing with people less intelligent than themselves. So why not me?
Also, Bell, I have difficulties accepting your point about everyone being worthy. Surely, it's logical that people can only have wealth and success when other people don't. Think about it like this: if everyone had a million pounds then a million pounds would be worth nothing, or for instance, I can only come first in a race if there are others to come 2nd, 3rd, 4th, 5th, etc.
Btw, when you say, "Something in your early past must have happened that gave you the idea that you are not worthy (of success, or in general)".. that is a point I suspect is true, but I have no idea what it is, or if knowing what it is achieves anything, anyway.
Thanks very much for your help. Although I viewed the website you gave, I have very limited use of the internet at the moment - will have to return to it at a better time, thanks.