“I never write anything down… I think comedy’s a spoken form, and if you’re writing it down you’re putting a bunch of filters on it…. If you write standup, you’re generating it on paper, and then you’re reading it, and then using your memory, and then…”
On killing old jokes:
“The way to improve is to reject everything you’re doing. You have to create a void by destroying everything. You have to kill it. Otherwise you’ll just say the same jokes every night for years and years. And I did that.”
Fun to compare his first appearance on Letterman, in 1995, to where he's at now.