“I'VE NEVER BEEN VERY SURE ABOUT WHAT IS RIGHT, said Bill Door. I AM NOT SURE THERE IS SUCH A THING AS RIGHT. OR WRONG. JUST PLACES TO STAND.”
Source: Reaper Man
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Terry Pratchett 796
English author 1948–2015Related quotes

Source: The Note Book of Elbert Hubbard (1927), p. 146.

“All through life, be sure and put your feet in the right place, and then stand firm.”
As recalled by Rebecca R. Pomroy in Echoes from hospital and White House (1884), by Anna L. Boyden, p. 61 http://books.google.com/books?id=7LZiAAAAMAAJ&pg=PA61&dq=feet
Posthumous attributions
Variant: Be sure you put your feet in the right place, then stand firm.

Rome, or Reason? A Reply to Cardinal Manning. Part I. The North American Review (1888)

In 1959 during the filming of On the Beach.
This has become a standing joke about Melbourne, but it's almost certainly either apocryphal or a misquotation.
Misattributed

Source: Earthsea Books, The Other Wind (2001), Chapter 5 “Rejoining” (p. 284)