“Natural science does not consist in ratifying what others have said, but in seeking the causes of phenomena.”
Attributed to Albertus Magnus in: Albertus Magnus; cited in: Morris Bishop (1968) The Middle Ages. p. 252.
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Dominican friar 1206–1280Related quotes

“The diligent investigator of natural phenomena can give the causes of all natural effects… by the”
On the Nature of Places, a continuation of the treatise On Lines, Angles and Figures as quoted by Amelia Carolina Sparavigna, "Translation and discussion of the De Iride, a treatise on optics by Robert Grosseteste" arXiv:1211.5961v1 http://arxiv.org/abs/1211.5961 @arXiv.org, Cornell University (2012)
Context: The diligent investigator of natural phenomena can give the causes of all natural effects... by the rules and roots and foundations given from the power of geometry.

Source: "Outlines of the Science of Energetics," (1855), p. 121; Lead paragraph: Section "What Constitutes A Physical Theory"

Source: Reason: The Only Oracle Of Man (1784), Ch. VI Section III - Rare and Wonderful Phenomena no evidence of Miracles, nor are Diabolical Spirits able to effect them, or Superstitious Traditions to confirm them, nor can Ancient Miracles prove Recent Revelations

Talk at the 50th anniversary of New Scientist magazine (2006).

"On the Conservation of Force" (1862), p. 279
Popular Lectures on Scientific Subjects (1881)
Jay Lemke (2003), "Teaching all the languages of science: Words , symbols, images and actions," p. 3; as cited in: Scott, Phil, Hilary Asoko, and John Leach. "Student conceptions and conceptual learning in science." Handbook of research on science education (2007): 31-56.

Source: 1950s, The development of operations research as a science, 1956, p. 265, the lead paragraph ; Cited in: Joe Kelly (1969) Organizational behaviour. p. 26.