Well, the first thing is that truth and power for me form an antithesis, an antagonism, which will hardly ever be resolved. I can define in fact, can simplify the history of human society, the evolution of human society, as a contest between power and freedom.
While I am on, I can discipline myself to that extent. When I am off, I can't discipline myself at all. On the other hand, when I am off, there are so many things I like doing, it doesn't really matter.