Why is it so hard to convince myself of something that I logically know is true?

Sometimes, we don’t want to admit something about ourselves that we know is true because we are scared of what others might think of ourselves, when we aren’t even happy with ourselves. We are in denial. And that is okay.

I think that, at least in my experience, a lot of the time I'll know something to be true but it won't feel that way. In my case, the reason for that is that when I make mistakes I don't think 'I did something bad' but rather 'I am bad'. Falling into those negative thinking patterns in those instances makes us more susceptible to doubting ourselves and what we know to be true. So we might question what we know to be true, what makes sense, in favor of what we feel in that particular instance. So maybe don't try to convince yourself but rather pay attention to the way you feel and think during those times for some clarity. In my case, hearing from somebody else what I know to be true also helps.

I've wondered this a lot myself actually. I have OCD so my brain is accustomed to rejecting logical ideas, like washing my hands over and over is not health, it has gotten better as I grew older. Although, for me at least, it didn't get any better until I saw a psychiatrist and started taking medication that helps with the OCD ruminations. It can be really hard to believe something that your mind simply doesn't want to be real. Talking to a therapist was very helpful, it let me know that I'm not the only person who goes through this.

Because sometimes the logical answer will hurt you, so its a lot more easier and simple for people to choose every other answer around it so it doesn't hurt. A lot like denial.

I think this is something that happens to us all. We love something, we care for someone, and they do not love us back but our heart still says "No, you can't leave him/her" And this is not only the case, every one has a different story. But the main thing is, in our heart we do not want to let go that feeling. That's why it becomes hard for us to accept that thing truly. It takes a lot of time and courage to accept the things that your heart is not willing to accept. So just sit and think about that particular thing and try to convince yourself and move on because this is the only thing you will be doing sooner or later