How Do You Change Your Mind When You Meet New Evidence?

How do you take somebody who's naturally close minded and develop overtime? I would imagine it's probably not a lightswitch, this open mindedness to the point where you can give up your beliefs or cherished thoughts about something. So i guess i have this, this mental model. And so the implication of that is i would like to change my mind when hen encounter new evidence. In fact, i want to seek out new evidence that might cause me to change mymind,. if not just passively accept it when it comes how do we get to a point where we do that?"