"If we ever want to leave, we have to build an Afghan government that can accomplish those goals (of good government) on its own."
There was a joke about the late Yugoslav leader Tito that went like this:
Q:"How does Tito's last will and testament begin?"
A:"If I ever die..."
Reality is at times more comical then jokes, or in the case of US involvement in Afganistan, tragicomical.