If we can't think for ourselves, if we're unwilling to question authority, then we're just putty in the hands of those in power.
Carl SaganThe nuclear arms race is like two sworn enemies standing waist deep in gasoline, one with three matches, the other with five.
Carl SaganWe are, in a way, temporary ambulatory repositories for our nucleic acids. This does not deny our humanity; it does not prevent us from pursuing the good, the true and the beautiful. But it would be a great mistake to ignore where we have come from in our attempt to determine where we are going.
Carl Sagan