Trying to reach a zen state

Several weeks ago I asked a fellow graduate student, who was preparing to take his qualifying exams, how he was doing. He told me that he was vacillating between obnoxious arrogance and crippling depression. And I'm starting to realize how right he was. There are days when I feel like I'm sitting on top of something really amazing (as far as my MA project). And then there are days when I think that my committee will not only fail me, but laugh me out of the room.