Every gun that is made, every warship launched, every rocket fired signifies in the final sense, a theft from those who hunger and are not fed, those who are cold and are not clothed. This world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children. This is not a way of life at all in any true sense. Under the clouds of war, it is humanity hanging on a cross of iron.

Science becomes dangerous only when it imagines that it has reached its goal.

A lie is a lie even if everyone believes it. The truth is the truth even if nobody believes it.

He that will not reason is a bigot; he that cannot reason is a fool; he that dares not reason is a slave.