“It is not necessary to change. Survival is not mandatory.”

Attributed to Edmund Burke, to William Gerard Hamilton, to George Bernard Shaw, to John F. Kennedy (who quoted it) and to Benjamin Disraeli, it was actually said by Lucius Cary, 2nd Viscount Falkland in a speech in the House of Commons on 1641-11-22.
Misattributed

Generation of Greatness (1957)
Context: In thinking about what the human animal might have gone through in the evolutionary process, have you wondered how some of the small changes which must have occurred could have had survival value? Haven't you wondered how they could have survived, when, in all of our experimental work every small change we make dies? … How many changes must have occurred in the human eye, occurred and died, before one change came along — an apparently trivial change … that gave the whole animal a significant increase in its power to perceive and hunt down its enemies and find its food. This is the kind of change that survives.

Revolution by Number

As quoted in Life In the Open Sea (1972) by William M. Stephens, p. 21.
1970s and later

Source: Man's Search for Meaning

Les Loix du Mouvement et du Repos, déduites d'un Principe Métaphysique (1746)

Vanna Bonta on the Northrop Grumman Lunar Lander Challenge. BonNova | X PRIZE Foundation official http://space.xprize.org/ng-lunar-lander-challenge/2008/teams/bonnova

European Parliament debates http://www.europarl.europa.eu/sides/getDoc.do?pubRef=-//EP//TEXT+CRE+20050623+ITEM-004+DOC+XML+V0//EN&language=EN&query=INTERV&detail=4-010
Speech to the European Parliament outlining the priorities of the British Presidency, 23 June 2005.
2000s