Our assumptions mostly come from survival. If trying and failing used to cost you too much, your mind will try to keep you from repeating that risk. You have to recognize though, that maybe things are different now. You have better tools, more knowledge and awareness…you can handle more than you could before. The question is are you making decisions from who you are now, or from who you used to be?
Sometimes the only thing standing between you and a new outcome is a belief you’ve never questioned. No one is saying to you to suddenly start believing anything is possible, but you need to start challenging the belief that nothing is.