"Close your eyes and imagine the best version of you possible. That's who you really are, let go of any part of you that doesn't believe it. Assaad ill go a step further & say let go of ANONE who doesn't believe it!
The only thing to do is to accept what your brain is throwing at you and learn from it. But what is possible, is taking actions today that are going to make your brain better able to make healthy decisions in the future.