I recently did a 21-day purification where you could only eat salad and everything had to be organic. I thought I would die eating nothing but salad and got to the point where I did not want to take another bite of it; but, I made it through. The amazing thing was that I felt so much better. I decided this was going to be my lifestyle until brain got into it and convinced me it would be too hard and too confusing to do. My brain told me I would have to be too disciplined to do this and did not have the time.
Just because you tried something once and did not do it right the first time does not mean you are going to be a failure forever. Even with me, I will do it over and over and over again until my brain says it will agree with me. My brain is not going to be in charge of me.
Empower yourself with the words that you say by choosing to focus on a positive outcome. Change how you feel and look for pleasure in the things that you embrace.