One of the definitions of sanity is the ability to tell real from unreal. Soon we'll need a new definition.

The recognition that no knowledge can be complete, no metaphor entire, is itself humanizing. It counteracts fanaticism. It grants even to adversaries the possibility of partial truth, and to oneself the possibility of error.

The responsibility for change...lies within us. We must begin with ourselves, teaching ourselves not to close our minds prematurely to the novel, the surprising, the seemingly radical.

The next major explosion is going to be when genetics and computers come together.

There are discoverable limits to the amount of change that the human organism can absorb.

Science fiction is the sovereign prophylactic against future shock.

Future shock is the dizzying disorientation brought on by the premature arrival of the future.