Directing is a more pragmatic experience, where you have to deal with the restrictions of time and money that force you to make certain decisions you don't have to make when you're writing.
“And the Blue Angels are coming back to scare the local population. I remember seeing old Vietnamese women ducking under the benches in Washington Square; they thought they were back in the war.”
“Every man who rises above the common level has received two educations: the first from his teachers; the second, more personal and important, from himself.”