The drill instructor must have total and complete control. Mindless obedience is what he's after.
“When you write down your ideas you automatically focus your full attention on them. Few if any of us can write one thought and think another at the same time. Thus a pencil and paper make excellent concentration tools.”
“According to the papers, I'm miserable, alienated, and on the brink of resignation. But that's simply not where I am.”