"The price of freedom is eternal vigilance."

It would be wonderful if defending freedom were a one-off job like proving Fermat's Last Theorem. As it turns out, it's an endlessly recurring job like fighting disease; unfortunate, but that's the way it is. And yes, sometimes our efforts fail, and freedoms are lost or people get sick and die. But the answer to that is to work harder and smarter, not to give up.