This 2012 commercial is really powerful about the notion of greatness and how it is defined. The reality is that no one is entitled to greatness, but we are all capable of it. It is not a birth right. Greatness comes with a price. The price of the day in and the day out: "the grind". It is the sum total of each step you take towards a goal, whether it be in your life or your career. You are ultimately accountable.
When you stop to think about what may feel like an insurmountable goal, it is easy to get overwhelmed and in some cases experience paralysis. So, I urge you to stop thinking so much. Stop worrying and start doing the work. Success will come if you commit to doing the work. That much I can promise you. As it relates to your career or your current job search, do the work and be prepared for every interaction you have professionally. It takes time and can feel tedious at times (e.g. editing and updating that resume continually), but always be prepared.
Accept that you will fail at times in your journey to greatness or success. You won't always get the job or promotion. Failure is just the Universe's way of telling you what is not working or that it may have not been the right opportunity for you. Embrace failure as much as success. While not easy to fail, it is normally when you grow the most if you are open to the lessons you need to learn.
Just never stop moving, never stop doing and you will achieve great things in your career and life. Most importantly, let yourself be the judge of what greatness means to you. Don't let others define that for you. It's your life and your story to tell. Now, go be great!