“These principles [in art], forgotten over time, were rediscovered by a few geniuses such as Rembrandt, Vélazquez, Délacroix, Corot and Manet. These principles can be deduced from innate principles within us, ideas of harmony, common to all unspoiled men.... these are the laws of harmony and color.”

Source: Rudimental Divine Science, p. 1

which alas! is all too inadequate
The Law (1850)

Brazil’s top bishop: Without solidarity, Brazil could become new epicenter of the coronavirus pandemic https://www.americamagazine.org/politics-society/2020/05/18/brazils-top-bishop-without-solidarity-brazil-could-become-new-epicenter (May 18, 2020)

Source: Mathematical Thought from Ancient to Modern Times (1972), p. 580
Context: Fermat knew that under reflection light takes the path requiring least time and, convinced that nature does indeed act simply and economically, affirmed in letters of 1657 and 1662 his Principle of Least Time, which states that light always takes the path requiring least time. He had doubted the correctness of the law of refraction of light but when he found in 1661 that he could deduce it from his Principle, he not only resolved his doubts about the law but felt all the more certain that his Principle was correct.... Huygens, who had at first objected to Fermat's Principle, showed that it does hold for the propagation of light in media with variable indices of refraction. Even Newton's first law of motion, which states that the straight line or shortest distance is the natural motion of a body, showed nature's desire to economize. These examples suggested that there might be a more general principle. The search for such a principle was undertaken by Maupertuis.

Source: Small Houses: Their Economic Design and Construction (1922), Ch. II

The History of Freedom in Christianity (1877)
Context: The French philosopher Charron was one of the men least demoralised by party spirit, and least blinded by zeal for a cause. In a passage almost literally taken from St. Thomas, he describes our subordination under the law of nature, to which all legislation must conform; and he ascertains it not by the light of revealed religion, but by the voice of universal reason, through which God enlightens the consciences of men. Upon this foundation Grotius drew the lines of real political science. In gathering the materials of International law, he had to go beyond national treaties and denominational interests, for a principle embracing all mankind. The principles of law must stand, he said, even if we suppose that there is no God. By these inaccurate terms he meant that they must be found independently of Revelation. From that time it became possible to make politics a matter of principle and of conscience, so that men and nations differing in all other things could live in peace together, under the sanctions of a common law.

Source: The Character of Physical Law (1965), chapter 2, “ The Relation of Mathematics to Physics http://www.youtube.com/watch?v=M9ZYEb0Vf8U” referring to the law of conservation of angular momentum
Context: Now we have a problem. We can deduce, often, from one part of physics like the law of gravitation, a principle which turns out to be much more valid than the derivation. This doesn't happen in mathematics, that the theorems come out in places where they're not supposed to be!

Senate speech, 24 August, 2005 (excerpts)

as quoted by Dennis Overbye, Einstein in Love: A Scientific Romance (2001)