Exhaustion

He had exhausted his faculties- temporarily. Or at least he hoped temporarily. For if not temporarily how could he be expected to live with exhausted faculties? Not well. Not at all. Think of it: life without your faculties. You can't even think of it, for what would you be doing if you were thinking of it but exercising your faculties. And that starts to give you an idea of the degree of exhaustion involved- the fact that you can't have an idea of the degree of exhaustion involved.