"You go slow, be gentle.

It's no one-way street -- you know how you feel and that's all.

It's how the girl feels too. Don't press.

If the girl feels anything for you at all, you'll know."

"You heard the mathematics of it. 
In a month, he'll have as much in common with us as we'd have with a shipful of white mice."

"Instruments register only those things they're designed to register.

Space still contains infinite unknowns."

"We all have our darker side.

We need it; it's half of what we are.

It's not really ugly, it's human."

"The sound of male ego.

You travel halfway across the galaxy, and it's still the same song."

"Programming. Different word, but the same old promises made by Genghis Khan, Julius Caesar, Hitler, Ferris, Maltuvis."

"Eternal childhood, filled with play, no responsibilities.

It's almost like a dream."

"Where there's no emotion, there's no motive for violence."

"You know the greatest danger facing us is ourselves, an irrational fear of the unknown.

But there's no such thing as the unknown-- only things temporarily hidden, temporarily not understood."

"A man either lives life as it happens to him, meets it head-on, and licks it.

Or he turns his back on it and starts to wither away"

"Do you play God, carry his head through the corridors in triumph?

That won't bring back the dead, Jim."

"In a different reality, I could have called you friend. "

"A crewman's rights end where the safety of the ship begins."

"Life and death are seldom logical."

"I object to intellect without discipline. I object to power without constructive purpose."

"The truth is, I'm a little green man from Alpha Centauri, a beautiful place. You ought to see it."

"They're about to lop off the captain's professional head, and you're playing chess with the computer."

"I am Landru. I am he. All that he was I am, his experience, his knowledge."

"It has been said that social occasions are only warfare concealed."

"Death. Destruction. Disease. Horror.

That's what war is all about.

That's what makes it a thing to be avoided."

"What can you expect from a simpering, devil-eared freak, whose father was a computer and his mother an encyclopedia?"

"Either one of us by himself is expendable. Both of us are not."

"Curious how often you Humans manage to obtain that which you do not want."

"They will be able to find a way to give each man hope and a common future and those are the days worth living for."

"Pain is a thing of the mind. The mind can be controlled."