Experience has taught me that you have to improve all the time-little bit by little bit-and not keeping starting everything from new.
But the law of God came from heaven indeed. God wrote it with his finger, it is the fountain of all wisdom, and therefore shall it continue for ever, and never have an end.
At the very end of a book I can manage to work for longer stretches, but mostly, making stuff up for three hours, that's enough. I can't do any more. At the end of the day I might tinker with my morning's work and maybe write some again. But I think three hours is fine.