The Chinese pianist Liu Chi Kung was imprisoned for seven years during the Cultural Revolution, during which time he had no access to a piano. When he returned to giving concerts again after he was released, his playing was better than ever. Asked how this was possible since he had not practice for seven years, he replied: I did practice, every day. I rehearsed every piece I had ever played, note by note, in my mind.
— Bernie Zilbergeld

This is how I define grace: you're on the main stage, and it looks like it has been rehearsed 100 times, everything goes so smoothly. That's where I get my confidence and success, from knowing that I have an edge because I know I'm prepared.
Alex Rodriguez rehearsed quote

The facts of history have been too well rehearsed (I'm speaking needless to say not of written history but the oral kind that goes on in you without your having to do anything about it). . .
— John Ashbery

I love to be in the position of not knowing what I'm gonna do, but having rehearsed all of those so when something happens with the others actors I go with whatever that is I'm getting.
— Wayne Rogers

Well, you know it was so different from when you rehearsed. You're out there with your guitar and trying to get a sound, but it doesn't sound anything like what you expect!
— Jonathan Richman