Every area except weight loss

Hi Brooke,
I have a few questions regarding thought work on believing something when you don’t.
You have mentioned that we should not look to the past for answers.
I have created many amazing things/situations in my life by believing I could do them before having proof or knowing the steps to get there.
My first question is why is it bad to look back to examples of how I created great things with my mind when it seemed to have worked?
My second question is how can you believe something you don’t yet believe?
Is it a compelling reason that creates the belief?
I feel like I am able to apply all of this work to every area of my life except weight loss.

Thank you so much for all your hard work and for sharing it with us!!