Lack of discipline leads to frustration and self-loathing.
People who fail to achieve their goals usually get stopped by frustration. They allow frustration to keep them from taking the necessary actions that would support them in achieving their desire. You get through this roadblock by plowing through frustration, taking each setback as feedback you can learn from, and pushing ahead. I doubt you'll find many successful people who have not experienced this. All successful people learn that success is buried on the other side of frustration.
People need trouble -- a little frustration to sharpen the spirit on, toughen it. Artists do; I don't mean you need to live in a rat hole or gutter, but you have to learn fortitude, endurance. Only vegetables are happy.
Nostalgia is a necessary thing, I believe, and a way for all of us to find peace in that which we have accomplished, or even failed to accomplish. At the same time, if nostalgia precipitates actions to return to that fabled, rosy-painted time, particularly in one who believes his life to be a failure, then it is an empty thing, doomed to produce nothing but frustration and an even greater sense of failure.
Winning isn't everything to me, but it's a close second. Losing isn't something that I can just brush off and fake a smile to hide my frustration. It's that will and determination that I hope will get me where I want to go.
The power of your subconscious mind will build up mental and physical wounds, proclaim liberty to the fear ridden mind, and liberate you completely from the limitations of poverty, failure, misery, lack, and frustration.
I became an entrepreneur by mistake. Ever since then I've gone into business, not to make money, but because I think I can do it better than it's been done elsewhere. And, quite often, just out of personal frustration about the way it's been done by other people.