There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we know we don't know. But there are also unknown unknowns. These are the things we don't know we don't know.

Presidents make history. I'm just a tool of history.

There is no place in the world where nobody dies. There is no place where nobody is hungry, or nobody hurts. That place is only in our imagination. But if we get our heads around it, we can go a little way toward making this real place more like that imaginary place. They call that place Utopia.

Well," I say, "we're practically there."
"Where?" says Jefferson.
"The future.

Never Sell Yourself Short.

There are things known and things unknown and in between are the doors.