The Three Principal Means of Investigation

We have three principal means: observation of nature, reflection, and experiment. Observation gathers the facts, reflection combines them, experiment verifies the result of the combination. It is essential that the observation of nature be assiduous, that reflection be profound, and that experimentation be exact. Rarely does one see these abilities in combination. And so, creative geniuses are not common.


Each is a virtue, and strength in all three is rare.

Folksonomies: scientific method knowledge virtue investigation

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 Thoughts on the Interpretation of Nature
Books, Brochures, and Chapters>Book:  Diderot, Denis (1999), Thoughts on the Interpretation of Nature, Clinamen PressLtd, Retrieved on 2014-01-22
  • Source Material []
  • Folksonomies: philosophy