It would be wonderful if every time you thought you knew something you could categorize that general perspective as either positive or negative, and then keep a tally of the on going results and look at a chart of your life. Look at how your life is today, how you feel about that life, and how you feel about the future or past. I think it would be very telling. I think if someone could see a chart kept in one place of when faced with a situation where they don't know the truth what their general opinion is that they would learn a lot about their selves. You may not be shocked, but you may learn a lot. You may even be grateful for such a set of knowledge.
You may never do this. Some people including my self do not enjoy being so regimented and having to do such things.
I think it would be more functionally and actively healthy to do a regular reflection on your thoughts.
Just be aware. It seems this idea keep coming up.