Robert A. Heinlein book The Moon Is a Harsh Mistress
Source: The Moon is a Harsh Mistress
Robert Anson Heinlein was an American science fiction writer. Often called the "dean of science fiction writers", his sometimes controversial works continue to have an influential effect on the genre, and on modern culture more generally.
Heinlein became one of the first American science fiction writers to break into mainstream magazines such as The Saturday Evening Post in the late 1940s. He was one of the best-selling science fiction novelists for many decades, and he, Isaac Asimov, and Arthur C. Clarke are often considered the "Big Three" of English-language science fiction authors. Among his most notable works are Stranger in a Strange Land, Starship Troopers, which helped create the space marine and mecha archetypes, and the libertarian novel The Moon is a Harsh Mistress.
A writer also of numerous science fiction short stories, Heinlein was one of a group of writers who came to prominence under the editorship of John W. Campbell at his Astounding Science Fiction magazine; however, Heinlein denied that Campbell influenced his writing to any great degree.
Within the framework of his science fiction stories, Heinlein repeatedly addressed certain social themes: the importance of individual liberty and self-reliance, the obligation individuals owe to their societies, the influence of organized religion on culture and government, and the tendency of society to repress nonconformist thought. He also speculated on the influence of space travel on human cultural practices.
Heinlein was named the first Science Fiction Writers Grand Master in 1974. He won Hugo Awards for four of his novels; in addition, fifty years after publication, five of his works were awarded "Retro Hugos"—awards given retrospectively for works that were published before the Hugo Awards came into existence. In his fiction, Heinlein coined terms that have become part of the English language, including "grok", "waldo", and "speculative fiction", as well as popularizing existing terms like "TANSTAAFL", "pay it forward", and "space marine". He also anticipated mechanical computer aided design with "Drafting Dan" and described a modern version of a waterbed in his novel The Door into Summer, though he never patented or built one. In the first chapter of the novel Space Cadet he anticipated the cell-phone, 35 years before Motorola invented the technology. Several of Heinlein's works have been adapted for film and television.

Robert A. Heinlein book The Moon Is a Harsh Mistress
Source: The Moon is a Harsh Mistress
“Who is more real? Homer or Ulysses? Shakespeare or Hamlet? Burroughs or Tarzan?”
Robert A. Heinlein book The Number of the Beast
Source: The Number of the Beast
Robert A. Heinlein book Between Planets
Source: Between Planets (1951), Chapter 2, “Mene, Mene, Tekel, Upharsin” (p. 23)
“There is no way that writers can be tamed and rendered civilized. Or even cured.”
Robert A. Heinlein book The Cat Who Walks Through Walls
Source: The Cat Who Walks Through Walls
“Churches thrive on martyrdom and persecution.”
Robert A. Heinlein book Stranger in a Strange Land
Source: Stranger in a Strange Land
Robert A. Heinlein book The Moon Is a Harsh Mistress
Source: The Moon is a Harsh Mistress
“The drive for power is even less logical than the sex urge… and stronger.”
Robert A. Heinlein book Stranger in a Strange Land
Source: Stranger in a Strange Land
“Money problems can always be solved by a man not frightened by them.”
Robert A. Heinlein book Have Space Suit—Will Travel
Source: Have Space Suit—Will Travel
“Women talk when they want to. Or don't.”
Robert A. Heinlein book The Moon Is a Harsh Mistress
Source: The Moon is a Harsh Mistress
“He's as weird as snake's suspenders but sweet as a stolen kiss, too.”
Robert A. Heinlein book Stranger in a Strange Land
Source: Stranger in a Strange Land
“Madam, the commonest weakness of our race is our ability to rationalize our most selfish purposes.”
Robert A. Heinlein book The Star Beast
Source: The Star Beast (1954), Chapter 14, “Destiny? Fiddlesticks!” (p. 219)
Robert A. Heinlein book Expanded Universe
Source: "The Happy Days Ahead" in Expanded Universe (1980)
Context: I started clipping and filing by categories on trends as early as 1930 and my "youngest" file was started in 1945.
Span of time is important; the 3-legged stool of understanding is held up by history, languages, and mathematics. Equipped with these three you can learn anything you want to learn. But if you lack any one of them you are just another ignorant peasant with dung on your boots.
“… a book need never die and should not be killed; books were the immortal part of man.”
Robert A. Heinlein book Farnham's Freehold
Source: Farnham's Freehold
Robert A. Heinlein book The Moon Is a Harsh Mistress
Source: The Moon is a Harsh Mistress
“Christ was crucified for preaching without a police permit”
Robert A. Heinlein book Stranger in a Strange Land
Source: Stranger in a Strange Land
Robert A. Heinlein book Starship Troopers
Source: Starship Troopers
“Damnit! Nationalism should stop at the stratosphere!”
Robert A. Heinlein book The Man Who Sold the Moon
Source: The Man Who Sold the Moon
Robert A. Heinlein book The Cat Who Walks Through Walls
Richard Ames; chapter 3, p. 27
Source: The Cat Who Walks Through Walls (1985)
“If you wanted to teach a baby a lesson, would you cut its head off?”
Robert A. Heinlein book Starship Troopers
Source: Starship Troopers
“Every general prohibition creates its bootleggers.”
Robert A. Heinlein Time Enough for Love
Source: Time Enough for Love