The willingness to change - to get out of your comfort zone

Is it possible that you are not successful yet, because you don't want to get out of your comfort zone? Maybe you think with the logical part of your brain that you want to achieve goal X, but maybe you would have to get off your butt and do some work for it, daily. Maybe you would have to confront that old fear you've been carrying around forever - that you're afraid of speaking your mind for fear someone will ridicule you or what you say. But that's what you have to do if you want to achieve the goal that you've said you want to achieve. So perhaps you're working at loggerheads with yourself? One part wanting it, and the other part telling yourself regularly that you'd have to become someone other than who you are at present. And then telling yourself, that that's too scary.
The truth is, you do have to take on different aspects of yourself in order to have a different life. It simply wouldn't be possible without this willingness to change.