In this complex world, the scientific method, and the consequences of the scientific method are central to everything the human race is doing and to wherever we are going.

Once a man gets a reputation as a liar, he might as well be struck dumb, for people do not listen to the wind.

Any group is weaker than a man alone unless they are perfectly trained to work together.

Theology is never any help; it is searching in a dark cellar at midnight for a black cat that isn't there. Theologians can persuade themselves of anything.

Liberty is never unalienable; it must be redeemed regularly with the blood of patriots or it always vanishes. Of all the so-called natural human rights that have ever been invented, liberty is least likely to be cheap and is never free of cost.

Violence never settles anything should be debated by the ghosts of Hitler and Stalin, with the city fathers of Carthage as referees.

Always listen to experts. They'll tell you what can't be done, and why. Then do it.