Man's greatest asset is the unsettled mind.

Do not forget that a traitor within our ranks, known to us, can do more harm to the enemy than a loyal man can do good to us.

Politically popular speech has always been protected: even the Jews were free to say ‘Heil Hitler.’

Before another century is done it will be hard for people to imagine a time when humanity was confined to one world, and it will seem to them incredible that there was ever anybody who doubted the value of space and wanted to turn his or her back on the Universe.

Any teacher that can be replaced by a computer should be replaced by a computer.

It seems to me, Golan, that the advance of civilization is nothing but an exercise in the limiting of privacy.

Computerization eliminates the middleman