Frases de Robert Anson Heinlein

Fuente: Tiempo para amar (1973).

Fuente: La luna es una cruel amante.

Fuente: Glory Road (1963).

Fuente: La línea de la vida (1939).

The Green Hills of Earth

The Door Into Summer

Starship troopers

Original en inglés: «Violence, naked force, has settled more issues in history than has any other factor, and the contrary opinion is wishful thinking at its worst».
Fuente: Starship Troopers, (1959).

Fuente: [Zelinski], Ernie J. 101 cosas que ya sabes, pero siempre olvidas, p. 102. Editorial AMAT, 2012. https://books.google.es/books?id=vOLIXDVy_m8C&pg=PA125&dq=%22Henry+Miller%22+dijo&hl=es&sa=X&ved=0ahUKEwis7u7a0tfiAhXK8OAKHRtXBWEQ6AEIVDAI#v=onepage&q=%22Henry%20Miller%22%20dijo&f=false En Google Books. Consultado el 7 de junio de 2019.

Part of the secret "call and response" codewords by which members of the long-lived Howard Families can identify others:
: Life is short.
But the years are long.
Not while the evil days come not.
Methuselah's Children (1958)

Time Enough for Love (1973)

Fuente: Time Enough for Love

Fuente: Time Enough for Love (1973)

"Jubal Harshaw" in the first edition (1961); the later 1991 "Uncut" edition didn't have this line, because it was one Heinlein had added when he went through and trimmed the originally submitted manuscript on which the "Uncut" edition is based. Heinlein also later used a variant of this in The Cat Who Walks Through Walls where he has Xia quote Harshaw: "Dr. Harshaw says that 'the word "love" designates a subjective condition in which the welfare and happiness of another person are essential to one's own happiness.'"
Fuente: Stranger in a Strange Land (1961; 1991)

Time Enough for Love (1973)

Fuente: Time Enough for Love (1973)

Fuente: Time Enough for Love

Fuente: Time Enough for Love

Time Enough for Love (1973)

Time Enough for Love (1973)

The Man Who Sold the Moon (p. 100)
Short fiction, The Past Through Tomorrow (1967)

Gwen Novak (Hazel Stone); chapter 18, p. 230
The Cat Who Walks Through Walls (1985)
Contexto: The hardest part about gaining any new idea is sweeping out the false idea occupying that niche. As long as that niche is occupied, evidence and proof and logical demonstration get nowhere. But once the niche is emptied of the wrong idea that has been filling it — once you can honestly say, "I don't know", then it becomes possible to get at the truth.

Fuente: Time Enough for Love

Fuente: Time Enough for Love

Fuente: Time Enough for Love (1973)

Fuente: Time Enough for Love

Fuente: Stranger in a Strange Land

Fuente: Time Enough for Love

Fuente: Time Enough for Love

Time Enough for Love (1973)
Variante: Progress doesn't come from early risers — progress is made by lazy men looking for easier ways to do things.

Variante: Take big bites. Anything worth doing is worth overdoing.
Fuente: Time Enough for Love

Fuente: Have Space Suit—Will Travel (1958), Chapter 11

Methuselah's Children (1958)

Fuente: Have Space Suit—Will Travel (1958), Chapter 2

Fuente: Have Space Suit—Will Travel (1958), Chapter 7