Robert A. Heinlein: Thing

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.

Variant: Take big bites. Anything worth doing is worth overdoing.
Source: Time Enough for Love

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

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

Guest of Honor Speech at the 29th World Science Fiction Convention, Seattle, Washington (1961)<br> The Quotable Heinlein http://www.quotableheinlein.com/html/home.html <br class="br">Context: I also think there are prices too high to pay to save the United States. Conscription is one of them. Conscription is slavery, and I don&#x27;t think that any people or nation has a right to save itself at the price of slavery for anyone, no matter what name it is called. We have had the draft for twenty years now; I think this is shameful. If a country can&#x27;t save itself through the volunteer service of its own free people, then I say : Let the damned thing go down the drain!

Variant: I've found out why people laugh. They laugh because it hurts so much... because it's the only thing that'll make it stop hurting.
Source: Stranger in a Strange Land

Source: Stranger in a Strange Land

Source: Friday

Source: Between Planets

Source: The Moon is a Harsh Mistress

Source: The Notebooks of Lazarus Long

Source: The Moon is a Harsh Mistress

Source: The Moon is a Harsh Mistress

Source: Starship Troopers

Source: Starman Jones (1953), Chapter 10, “Garson’s Planet” (p. 109)

Source: Sixth Column (1949; originally serialized in 1941), Chapter 10 (p. 129)

Source: Sixth Column (1949; originally serialized in 1941), Chapter 5 (p. 57)

Source: Red Planet (1949), Chapter 9, “Politics”, p. 133