“I have no need of proof. The laws of nature, unlike the laws of grammar, admit of no exception.”

Ein scheinbarer Widerspruch gegen ein Naturgesetz ist nur die selten vorkommende Betätigung eines andern Naturgesetzes.
Source: Aphorisms (1880/1893), p. 36.

Science and the Unseen World (1929)
Context: To those who have any intimate acquaintance with the laws of chemistry and physics the suggestion that the spiritual world could be ruled by laws of allied character is as preposterous as the suggestion that a nation could be ruled by laws like the laws of grammar.<!--V, p.54

2010s <br class="br">Source: Robert Krulwich. &quot; Nature Has A Formula That Tells Us When It&#x27;s Time To Die http://www.npr.org/blogs/krulwich/2013/01/22/169976655/nature-has-a-formula-that-tells-us-when-its-time-to-die,&quot; at npr.org, Jan. 22, 2013.

Source: Mendel's Principles of Heredity (1913), Chapter XV, p. 289.

Il n’y a point de droit naturel: ce mot n'est qu’une antique niaiserie... Avant la loi il n’y a de naturel que la force du lion, ou le besoin de l’être qui a faim, qui a froid, le besoin en un mot.
Vol. II, ch. XLIV
Variant translation: There is no such thing as natural law, the expression is nothing more than a silly anachronism … There is no such thing as right, except when there is a law to forbid a certain thing under pain of punishment. Before law existed, the only natural thing was the strength of the lion, or the need of a creature who was cold or hungry, to put it in one word, need.
As translated by Horace B. Samuel (1916)
Le Rouge et le Noir (The Red and the Black) (1830)

Colt v. Glover (1614), Lord Hobart's Rep. 149.

governing their formation
As quoted in "On 'computabilism’ and physicalism: Some Problems" by Hao Wang, in Nature’s Imagination (1995), edited by J. Cornwall, p.161-189

2010s, 2016, September, First presidential debate (September 26, 2016)