That mindset will take you a LONG way! I am currently on day 16 of 40 but have just emerged from a pretty grotty couple of lethargic days, triumphant and simply buzzing with the energy I have been hearing about for such a long time!
I think that listening to our bodies is incredibly powerful in our arsenal of tools for success. We have so much success and power and once we stop overloading our poor overworked systems with toxic food we can start to shed the covering that dulls our senses and abilities.