Hi Jen,
It's so true! Funny, many years ago I went blind in my left eye (baffled many doctors). My boss at that time told me to train my mind and say to myself "I can see" not "I want to see" but I can. She explained to me that cells renew themselves constantly and by training my conscious mind the words enter my subconscious which affects my cells, DNA, etc.
After about 6 months of doing this I was able to see out of my left eye! Not totally but I was not blind anymore. I went to my eye doctor and asked them to give me those extensive tests they did before, they looked at me like I had 2 heads and didn't want to do it.
I insisted and said "hey, I'm paying for it, I want it done!".. So they did the tests and were shocked!
Denise