Along similar lines, Quora user Zsolt Hermann says you might not be inspired anymore. He writes:
"All of these problems — finding worthy, realistic, all-important goals, receiving the necessary support, inspiration all the time, and finding the necessary mutually responsible, mutually complementing interconnections — can be solved in the right, purposeful, mutually supportive environment."
The reason you've run out of inspiration could be your environment, according to Hermann. Take another look at the people around you. Are they supportive? Do they believe in your big idea, career, or creative endeavor? If not, they may not be invested in your success. Instead, make lasting connections with people who are.