Hi.
I lost my post by trying to give examples because it is hard to explain the difference between assumptions, thoughts and beliefs. So here goes again with the short version. I may have to do this in more than one post.
An assumption is a mental action based on a thought based on a core belief. And there effectiveness is in that order with the assumption being stronger than the thought being stronger than the belief in effect but not actuality. What I mean is that there will be more assumptions and thoughts than beliefs, they will dictate more than the core belief but it is still in actuality the core belief that is doing the dictating. Confusing?
Most core beliefs are built in early childhood (not all) and we build core thoughts on these that if long enough and strong enough can become other core beliefs. Assumptions are mental actions built on the core thoughts built on the core belief. (s)
Assuming you know what will happen before it does because a thought built on a belief is one of these things. EG. Core belief. "I will never amount to anything". Core thought. Situations and people have led me to believe this. (thought) Assumption. I might as well not try because past failures have proved this.
Now if this was one straight line with one thought and one assumption built on one belief it would be easy to fix. But there can be many negative thoughts built on a core belief with many assumptions built on them.
Back to the original core belief. Lets add to it.
I can never have a house (car, horse, dog, girlfriend) because I will never amount to anything.
So why try. But I want to have a house. But I can't so why try. (assumption)
I tried and failed (once, twice?) assumption again based on a thought based on a core belief.
Since I'm a loser it doesn't matter if I amount to anything. So I can eat too much or drink too much or let myself go. (even though I know it is wrong)
What does it matter if I can't drive. No one wants to see me. I have no where to go. I can't do it anyway.
The list goes on and on. But you can see that this is all based on a couple of core beliefs.
You may think it is this never ending list that is controlling you but in actuality it is a couple of core beliefs.
Still there is one thing behind all of this. YOU. A core belief is just that. What you do with it and all those thoughts and assumptions and ultimately actions is still controlled by YOU.
So we are back to what to do with the core belief. Well leave it there. It is nearly impossible to remove, but it can be buried. If you know it is false and accept it then you can build something positive on it. Alternatively on the off chance it is true you can still build something positive on it. Notice how many "you's" I have used.
So ultimately you want to change how you are looking at the core belief. Pretty much it is simply a matter of using core thoughts to change your perspective of a core belief so it can't control you any more. This one simple thing will have profound effect on the future of your life. Why not, it also had profound effect on the past and still is having effect on the present. Time to change it. And you can change it. But you need the right attitude and the right belief. The three work together. (perspective, attitude and belief)
Davit.
Ps. The number of these beliefs, thoughts and assumptions is limitless but they don't have to be all negative.
teach me to quit doing the homework. Apparently 4 core beliefs were triggered this week. Kind of understandable that I crunched under the onslaught. I'll be working through the pages and try to get myself sorted out. I hope it is ok if I come back and ask some questions about the process. I'm sorry for the rant... lots of cognitive distortion going on. I'll be seeing my therapist tomorrow too. I'm so glad these lessons are printed here and available 24/7. Next time, hopefully, I'll read the lessons before posting. Thank you for your patience. 
