Who controls me?

So now it's after midnight... what is going on here?? Anyway, I was thinking today, "Who controls me?" I often times find myself saying, I need to go to sleep, or I need to eat something, or I have to do this or that. What is it that makes us have to do any of this stuff? Looking at 1 Corinthians 6:12 Paul talks about us being allowed to do anything through grace, but not everything being benefical but stipulates that he will not be mastered by anything. What are we mastered by? Are we mastered by our desires for sleep, food, money? Christ has given us the freedom to truly live, but we must be careful to keep our priorities straight. Think about this today as you go about your day.