Stop with the motivaton bullshit. Motivation means you must convince yourself to do something you don't want to do. And right now, you don't want to change your body, which is why you need to be motivated to go to the gym.
First, decide what you want most: laziness or goals via hard work.
Second, decide what goals you want to work toward.
Third, dedicate yourself to the goals, and to the work necessary to meet those goals.
We all struggle with this. We're all programmed to be motivated to do something. What it really is is not motivation, but choice . We must choose what we want, and then we must work for it. We must put up with hardship and pain to get to where we want to go.
All of us are used to getting things easily, and to getting comfy easily, even if we get fat and lazy. We're taught that comfiness and convenience are what we should desire. We must resist this, and exorcize it from our bodies and minds.
We're all on the same path. What we choose is what divides the common from the uncommon.