“The best and safest method of philosophizing seems to be, first to enquire diligently into the properties of things, and to establish these properties by experiment, and then to proceed more slowly to hypothesis for the explanation of them. For hypotheses should be employed only in explaining the properties of things, but not assumed in determining them, unless so far as they may furnish experiments.”
Letter to Ignatius Pardies (1672) Philosophical Transactions of the Royal Society (Feb. 1671/2) as quoted by William L. Harper, Isaac Newton's Scientific Method: Turning Data Into Evidence about Gravity and Cosmology (2011)
Help us to complete the source, original and additional information
Isaac Newton 171
British physicist and mathematician and founder of modern c… 1643–1727Related quotes

Kosmos (1932), Above is Beginning Quote of the Last Chapter: Relativity and Modern Theories of the Universe -->

“No More Making Whoopy in the Military?” http://barelyablog.com/no-more-making-whoopy-in-the-military Barely A Blog, December 23, 2009.
2000s, 2009

“Few rich men own their own property. The property owns them.”
Address to the McKinley League, New York (29 October 1896)

Letter to Marin Mersenne (1637) as quoted by D. E. Smith & M. L. Latham Tr. The Geometry of René Descartes (1925)

Query 31
Opticks (1704)

Appearance on The Howard Stern Show (1987).

“There is no such thing as intellectual property.”