Are we programmed to self sabatoge.

Ever wonder when everything is going good heck even great we fall back to what we know, what we love but hate all at the same time?
Why is that? Here is the picture I will paint and you can tell me the ending!

Everything is going great you've ate right, you've exercised all wanting to lose those pesky 10 lbs. you put on from the winter slumber. The scale is going down and you have 5 more to go til you get to goal when you feel the need to indulge...So you have a slice of cheesecake for dessert and wash it down with some wine. Not like it is going to do anything to those 5 lbs. you have already lost right? Well, when you wake up the next morning you step on the scale and see that you have packed on 2 lbs.! Now seriously could a piece of cake and a glass of wine really make you gain 2 lbs.? Probably not but all that you see is a gain and think," Wow, I have failed!" "Why do I do this!"
Well, why do you do it? I'm looking for solid answers. I am on the look out to figure out why I do this. Yes, I do this very same thing! It is like my body knows what I'm doing and is working hard but my mind is saying," Ok have we lost a few pounds so I can have that chocolate covered donut?" When you think about it is a true mind game you have with yourself. Almost like a conversation with your healthy eating side and your indulgence side. Guess which ones always wins with me! Which one wins with you?