Robert A. Heinlein: Trending quotes (page 2)

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

Source: Time Enough for Love

Source: Time Enough for Love (1973)

Time Enough for Love (1973)

Source: The Star Beast (1954), Chapter 3, “—An Improper Question” (p. 53)

Time Enough for Love (1973)

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

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)
Context: 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.

Source: Have Space Suit—Will Travel (1958), Chapter 3

Source: Stranger in a Strange Land

"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.'"
Source: Stranger in a Strange Land (1961; 1991)

The Moon Is a Harsh Mistress (1966)

Time Enough for Love (1973)

Logic of Empire (p. 335); this is one of the earliest known variants of an idea which has become known as Hanlon's razor.
Short fiction, The Past Through Tomorrow (1967)
Source: The Green Hills of Earth