'Sticky thinking' hampers decisions in depression

I recently read a book called "Don't Believe Everything You Think" by Joseph Nguyen which tackles this problem directly through a bit of mindfulness and eastern philosophy. In the book, he starts by distinguishing between "thoughts" and "thinking" and outlines how/why he believes the latter ultimately leads to most self-inflicted human suffering.

He has some techniques in the book for trying to break the cycle of rumination, but ultimately it comes down to willpower and repetition. As someone going through/coming out of serious depression for the past month, even if I'm able to stop my own rumination, if its severe or overwhelming enough, it will likely come back very soon if not immediately. I think time and healthy distractions are great complements.

Here's a quick story. It's unrelated to depression but it's something related to asking yourself "are you sure?".

I once had stitches which had to be removed after about 2 weeks. It was the only time I've gotten stitches.

It's a weird experience which involves a fair bit of tugging and feeling things you've never felt before along with maybe a little blood.

The doctor told me to let him know if it hurt. After the first tug I said is it normal to feel pain?

Then he asked me if what I'm feeling is really pain or is it a sensation?

Then he did it a few more times and he was right. I wasn't feeling real pain.

I was feeling a combination of sensations I wasn't familiar with. Yes there was a bit of tugging, pressure and a little bit of pinching but I wouldn't register it as "actual pain". Maybe it was like a 1.5 out of 10 on a pain scale. A minor discomfort at most and completely manageable.

But even now, years later I sometimes think back to that experience in other contexts and ask myself "are you sure?" when evaluating situations or thought processes. It's not a lack of confidence, it's more about making sure I'm assessing things in a fair and reasonable way.