It's tough to play the right chord on the instrument when there's someone out there who wants to kill you.
“Posterity: you will never know how much it has cost my generation to preserve your freedom. I hope you will make good use of it.”
“It's more along the lines of raising a child: we train the system to a certain range of behaviors that we find most useful. But then we let it go, because we don't want to have to be babysitting it the whole time.”