Robert A. Heinlein - The Door into Summer (1957)

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By the laws of statistics we could probably approximate just how unlikely it is that it would happen. But people forget—especially those who ought to know better, such as yourself—that while the laws of statistics tell you how unlikely a particular coincidence is, they state just as firmly that coincidences do happen.

Robert A. Heinlein
I have spent too much of my life opening doors for cats—I once calculated that, since the dawn of civilization, nine hundred and seventy-eight man-centuries have been used up that way. I could show you figures.

Robert A. Heinlein
Paymasters come in only two sizes: one sort shows you where the book says that you can't have what you've got coming to you; the second sort digs through the book until he finds a paragraph that lets you have what you need even if you don't rate it.

Robert A. Heinlein
Cats have no sense of humor, they have terribly inflated egos, and they are very touchy.

Robert A. Heinlein
When railroading time comes you can railroad—but not before.

Robert A. Heinlein
If you would know a man, observe how he treats a cat.

Robert A. Heinlein
Nothing could go wrong because nothing had...I meant "nothing would." No - Then I quit trying to phrase it, realizing that if time travel ever became widespread, English grammar was going to have to add a whole new set of tenses to describe reflexive situations - conjugations that would make the French literary tenses and the Latin historical tenses look simple.

Robert A. Heinlein
My old man claimed that the more complicated the law the more opportunity for scoundrels.

Robert A. Heinlein
I had taken a partner once before—but, damnation, no matter how many times you get your fingers burned, you have to trust people. Otherwise you are a hermit in a cave, sleeping with one eye open.

Robert A. Heinlein
The future is better than the past. Despite the crepehangers, romanticists, and anti-intellectuals, the world steadily grows better because the human mind, applying itself to environment, makes it better. With hands... with tools... with horse sense and science and engineering.

Robert A. Heinlein
Er, will your grandmother tell that fib for you?
I guess so. Yes, I'm sure she will. She says people have to tell little white fibs or else people couldn't stand each other. But she says fibs were meant to be used, not abused.
She sounds like a sensible person.

Robert A. Heinlein
An invention is something that was impossible up to then—that's why governments grant patents.

Robert A. Heinlein
They made the predictable fuss about taking a cat into a room and an autobellhop is not responsive to bribes—hardly an improvement. But the assistant manager had more flexibility in his synapses; He listened to reason as long as it was crisp and rustled.

Robert A. Heinlein