Open The Pod Bay Doors, Hal.

Behind Every Man Now Alive Stand Thirty Ghosts, For That Is The Ratio By Which The Dead Outnumber The Living.

If An Elderly But Distinguished Scientist Says That Something Is Possible, He Is Almost Certainly Right; But If He Says That It Is Impossible, He Is Very Probably Wrong.

As Three Laws Were Good Enough For Newton, I Have Modestly Decided To Stop There.

I Want To Be Remembered Most As A Writer - One Who Entertained Readers, And, Hopefully, Stretched Their Imagination As Well.

Even If We Never Reach The Stars By Our Own Efforts, In The Millions Of Years That Lie Ahead It Is Almost Certain That The Stars Will Come To Us. Isolationism Is Neither A Practical Policy On The National Or Cosmic Scale. And When The First Contact With The Outer Universe Is Made, One Would Like To Think That Mankind Played An Active And Not Merely A Passive Role-that We Were The Discoverers, Not The Discovered.