My dad always told me stuff like, "If you believe you can't do it, and you tell yourself you can't do it, you won't do it."
He was right to an extent because if you close your mind off you won't be able to complete anything.
There's also the familiarity concept. At first you don't like pickles, but as you grow up and pickles every now and then show up in your meals you get a taste for them.
So I'm wondering how far can you go in changing yourself? If you tell yourself you're capable of a change everyday, and expose yourself to it every day does it matter what it is?
Or are there inherent features in your DNA that will never allow you to change certain aspects of yourself.