“I strive for nothing if not consistency”

Some Men are More Perfect Than Others (1973)

Gesammelte Mathematische Werke (1876)

Laboratory journal entry #10,040 (19 March 1849); published in The Life and Letters of Faraday (1870) Vol. II, edited by Henry Bence Jones https://archive.org/stream/lifelettersoffar02joneiala#page/248/mode/2up/search/wonderful,p.248.This has sometimes been quoted partially as "Nothing is too wonderful to be true," and can be seen engraved above the doorway of the south entrance to the Humanities Building at UCLA in Los Angeles, California. http://lit250v.library.ucla.edu/islandora/object/edu.ucla.library.universityArchives.historicPhotographs%3A67
Context: ALL THIS IS A DREAM. Still examine it by a few experiments. Nothing is too wonderful to be true, if it be consistent with the laws of nature; and in such things as these, experiment is the best test of such consistency.

Source: Starship Troopers

François de La Rochefoucauld
Misattributed

Source: Summa Theologica (1265–1274), I–II, q. 3, art. 8 co

Source: Quotes from secondary sources, Dictionary of Burning Words of Brilliant Writers, 1895, P. 245.

As quoted by Bryant, ibid.
Astronomia nova (1609)
Context: Nothing which consists of corporeal matter is absolutely light, but that is comparatively lighter which is rarer, either by its own nature, or by accidental heat. And it is not to be thought that light bodies are escaping to the surface of the universe while they are carried upwards, or that they are not attracted by the earth. They are attracted, but in a less degree, and so are driven outwards by the heavy bodies; which being done, they stop, and are kept by the earth in their own place.

Introduction
1920s, An Autobiography (1927)