Hi MH,
This is a pretty complex question - I guess it has a lot to do with the nature of reality itself, and how we understand it! The first thing I want to ask, though, is - has your T said something that makes you feel she doubts what you are saying? If so, that is going to have lots of feelings attached to it for you (I'd feel hurt and angry and invalidated) and is worth addressing directly.
But as for therapists <i>in general</i> - and people in general - I guess it is my expectation that they will understand what I say as having been through the 'filter' of me. That's how I listen to other people, too - because I think that it's an absolutely necessary part of being human to interpret what happens to us through our own individual understandings of the world, and those understandings *change* things.
So if someone's looking for a parking space and finds one, they could interpret that as God answering their prayers, or good luck, or a function of chance, or the only good thing that happened that week, or it being a quiet day at the shops, for example. None of these interpretations will seem like distortions or exaggerations to the person who has them, because they come from that person's belief system. And none of those belief systems is necessarily wrong or problematic in any way. We're all entitled to our interpretations.
A good therapist, I think, will listen to the story about the parking space not only to understand what happened, but to understand the client's belief system too. Because we interpret our perceptions, and make decisions, based on our belief systems - they are a core part of our unique personalities. So I think they are really important for therapists AND clients to come to understand.
A lot of therapists (most? all? I don't know) think that what happens to us in our lives and especially in our childhoods affects our belief systems. And that painful experiences give us ways to understand the world that might protect us sometimes, but hurt us other times. I guess this is where understanding the 'filter' gets tricky, because all of this is really emotionally charged.
I'm going to make up an example: 'Clair' grows up in a house where Person X repeatedly tries to hurt her. She comes to believe that people will try to hurt her. For Clair, this is TRUE. As a kid, she NEEDS to believe it because the belief matches reality, and the belief tells her to be very wary of Person X. One day, at school, a teacher chides her for something. The teacher was not trying to hurt her, but Clair sees it that way and runs away, because it comes to her through the filter of her belief system.
Clair may not be able to tell the difference between chiding and a major threat, because she doesn't have the experience to help her with that - and because taking a risk on it is too dangerous. All the emotion of the threat comes up for her in the encounter with her teacher. To her, when she is chided by the teacher, she IS being hurt again. She takes that belief and experience into adulthood too.
To me, a good therapist for Clair as an adult will understand that there is a filter, AND understand that the emotions are real and the beliefs are valid. A good therapist will have a clear sense of where pain and trauma come from, so s/he can help Clair find the core of her experiences. S/he will help Clair process the feelings around what was happening for her at home. She might help Clair arrive at a more flexible belief ("Some people are dangerous some of the time, but not all of them all the time") and maybe in the process Clair might find a different interpretation of what happened with her teacher.
So THAT's my theory of therapy! Phew!! I guess I am procrastinating on some work.
I'm sorry if this is really off the mark for what you were thinking about.
But I also want to say this: At the times when I feel cared for and understood and respected by my therapist, it's okay with me when she challenges some of my beliefs or interpretations. Maybe the thing to work on is getting to a place with your T where you feel that secure - and maybe that will take a whole lot of validation. I hope you can get that (and take that) from her.
J