Defining Quotes (3 quotes)
Knowledge of the laws of nature offers humankind the only chance of survival in a changing environment. … The search for knowledge gives expression to a basic curiosity which appears to be the salient defining characteristic of human beings.
From opening paragraph of Preface, Quasars, Redshifts and Controversies (1987).
Laplace considers astronomy a science of observation, because we can only observe the movements of the planets; we cannot reach them, indeed, to alter their course and to experiment with them. “On earth,” said Laplace, “we make phenomena vary by experiments; in the sky, we carefully define all the phenomena presented to us by celestial motion.” Certain physicians call medicine a science of observations, because they wrongly think that experimentation is inapplicable to it.
From An Introduction to the Study of Experimental Medicine (1865), as translated by Henry Copley Greene (1957), 18. A footnote cites Laplace, Système du monde, Chap. 2.
Listen to the community: it’s defining its own problems, and may well know what to do about them.
As quoted in 'Aphorism of the Month', Journal of Epidemiology and Community Health (Nov 2007), 61, No. 11, 932.
In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.
(1987) -- 
