Changing my sentence I want to believe

Brooke, I have been diligent about doing my daily thought downloads and stating my new beliefs each day. I have a weight goal of 190 pounds. Today I wondered if I could/should change my sentence halfway through the month to “I will not struggle with overeating?” Part of me wants to change my sentence because I already believe I will get there and my problem has been being unable to maintain my weight loss in the past. Is it OK for my belief sentence to evolve or should I stick with my original until it is met?