I have a lifetime history of having been a very black-and-white thinker. I wasn't really cognizant of it until after my mental health diagnoses three years ago (depression, anxiety, PTSD/complex-PTSD, and Borderline Personality Disorder). In the process of trying to work with and recover from those issues I read as much information, and as many books and articles as I could, about all of these disorders and about black-and-white/dualistic/polarized thinking, as well as other cognitive distortions.
At the time of my diagnoses I was about a year and a half out from discovering my H's affair and was working with my third post-dday IC. I was very much wrapped up in a "victim role" (yes, I had been victimized, but I took on a victim "role" by allowing myself to believe that I was helpless to overcome the pain or change my life). That victim role contributed to, and increased the intensity of, my mental health issues. The IC, noticing this, recommended the book "Thoughts and Feelings" by Matthew McKay. Thank goodness for that - what an eye opener that book was for me!! I learned not just about black-and-white thinking, but about all of the other cognitive distortions/patterns of limited thinking that I was engaging in, such as filtering, overgeneralizing, catastrophizing, personalizing, etc. The book helped me to recognize these distortions, as well as develop alternative and more balanced thoughts when I noticed them arising.
An example from the book that I have used for addressing polarized thinking is to rate things in percentages -
so instead of saying:
"OMG, I'm ALWAYS late for EVERYTHING"
I reflect and say:
"I do have a tendency to be late for things, but I still make it on time for at least 60% of my appointments."
Another book that helped me was "Mindfulness for Borderline Personality Disorder" by Blaise Aguirre and Gillian Galen. It is geared to people with BPD, but I highly recommend it to anyone who is going through any type of emotional suffering, because it is loaded full of great mindfulness exercises that are easy to understand and practice. And mindfulness is such an excellent tool for exploring our thinking and behaviour from a place of "attention, awareness and curiosity", which allows us to recognize and break ineffective patterns.
"Watch and notice", also known as the "observe" skill in Dialectical Behaviour Therapy, is a mindfulness skill that encourages you to pay attention to what you are thinking and feeling. When you pay attention, you begin to see the automatic responses that you have, and how you
"tend to collect evidence - in the form of thoughts, memories, experiences, or cognitive distortions - that validates how you are feeling in the present moment".
You can Google "confirmation bias" for more info on that.
The second skill of mindfulness is "labelling", also known as the "describe" skill in Dialectical Behaviour Therapy. This skill is about putting words to your experience in a "factual and non-judgmental" way - noticing without evaluating. That means trying to "detach your opinions, approval, or disapproval from what IS".
Another great source I used to become more mindful, more self-aware, more open to my "blind spots", and more balanced in my thinking has been Pema Chodron. I have converted a number of her YouTube videos into mp3 format and have them loaded on my phone so I can listen to them whenever and wherever I want. I found her talks "Dealing With Difficult Emotions", "Going To The Places That Scare You", and "The Freedom of Choosing Something Different" quite helpful. (I believe I have links to all of them in my profile, if you're interested in checking them out).
DBT, the "Mindfulness for BPD" book, and Pema's videos also talk about the development of self-compassion and (radical) acceptance as part of mindfulness practice, as they help you to develop the skill of non-judgment toward yourself and others.
A really good source for learning to develop self-compassion is Kristin Neff. She has a book called "Self Compassion" that is full of exercises you can do to reinforce the material and concepts in the book. She also has a TEDTalk and a couple of YouTube videos in which she discusses the idea of self compassion (again, you can find links to a few of them in my profile).
It has been the combination of all of these concepts, teachings and resources that has allowed me to recognize, challenge and change my thinking and to be able to hold two (seemingly) contradictory ideas at the same time, thereby furthering my healing.
The key for me has been practicing these things regularly, in all areas of my life. I'm not perfect at it, nor do I aim to be, because that's unrealistic. I work on continuous improvement instead.
Paying attention in my daily interactions and activities, watching for and catching judgmental thinking and cognitive distortions in myself and in others. Looking for alternate ways to look at things - different perspectives and points of view.
If you read enough posts on SI you will begin to see that there are a lot of cognitive distortions (including black-and-white/polarized thinking) that occur in many threads. Start paying attention to them. Pay attention to the responses to those posts. Pay attention to the thoughts and physical sensations that arise when you are reading them. Pay attention to any judgments that come into your mind. Practice labelling the cognitive distortions you see in others AND in yourself. In your head, or in a notepad/journal, see if you can come up with alternate thoughts or perspectives. If you noticed yourself making a judgment about a person or situation described or a judgment about yourself as you were reading, get curious about where that judgment came from. Is there another way to look at it?
Practice doing the same thing in your every day life. Try catching yourself when you hear yourself saying the words "always", "never", "all", "nothing", "everybody", "nobody", and "should", "ought", "must", and replace them with more balanced words/statements.
Catch yourself when you label yourself or someone else either "good" or "bad", "wonderful" or "horrible", "smart" or "stupid", "happy" or "sad", etc - remind yourself that "people are too complex to be reduced to either-or judgments, and often fall somewhere along a continuum between those extremes", and can also display characteristics of both of those (seemingly) conflicting positions, so train yourself to look for the dialectic. Where do you fit on the continuum? Do you fit on both sides? What percentages would you give for each side?
If you consistently and continuously practice these skills, over time they will help you to improve your thinking, which in turn will help you discover the answers to your questions.
I'm sorry I have given you another long post with a lot of info in it to get through. I'm still working on learning how to be more concise!! I know there are things I forgot to touch on, but you will find them in the materials I've suggested.
I'm glad to see you are still posting btw.