If we are to survive, our loyalties must be broadened further, to include the whole human community, the entire planet Earth.
Carl SaganWe are not smart enough to decide which pieces of knowledge are permissible and which are not.
Carl SaganIf some good evidence for life after death were announced, I'd be eager to examine it; but it would have to be real scientific data, not mere anecdote. As with the face on Mars and alien abductions, better the hard truth, I say, than the comforting fantasy.
Carl Sagan