Time wasted: it all contributes

"If I end up with just a few lines of dialogue, it no longer panics me. All time spent considering your play is well spent, regardless of outcome. One day you write nothing, the next you write eight pages. It’s not in your hands."
David Hare

I like this. I like this bit; All time spent considering your play is well spent, regardless of outcome.

He's not saying it's okay to not produce. He's saying, the important thing is to stay focused, or 'hovering over' the project. It's good because the focus isn't on productivity or being prolific, and he's kind-of shrugging his shoulders. This is just the way it is.