That is, your mind - and your mindset, more specifically - is responsible for how successful you are in any career or activity, how others view you, your health, your physical strength and even how happy you are with what you've achieved.

Any change you want to create in your life starts with the decision to make that change. This is enough to mean that all change must necessarily come from within to begin with. Next, it is your conviction about that change that ensures you are able to carry it out, your planning and your determination. And finally, it is your perception of that change that determines whether or not you are happy with it.