One of the most fascinating things I read was the Rebbe quoting Chassidus that, ratzon matteh es haseichel:

 

 

Our desires creates our opinions!

 

Opinions are seen to be, as the prelude of desire – if I think something is good I do it, if I don’t, I don’t!

 

Is that why you are so good on a diet, or exercise, or giving up bad habits?!

 

It’s obvious, it’s not that way!

 

In fact what we desire – what instinctively gives us pleasure, or God forbid pain – is what we rationlize!