“History must be this or it is nothing. Every law which the state enacts indicates a fact in human nature; that is all. We must in ourselves see the necessary reason of every fact, — see how it could and must be.”

Lee v. Jones (1864), 17 C. B. (N. S.) 506.

26
A Vindication of the Rights of Woman (1792)

A Preliminary Discourse on the Study of Natural Philosophy (1831)
Context: We must never forget that it is principles, not phenomena, — laws not insulated independent facts, — which are the objects of inquiry to the natural philosopher. As truth is single, and consistent with itself, a principle may be as completely and as plainly elucidated by the most familiar and simple fact, as by the most imposing and uncommon phenomenon. The colours which glitter on a soapbubble are the immediate consequence of a principle the most important, from the variety of phenomena it explains, and the most beautiful, from its simplicity and compendious neatness, in the whole science of optics. If the nature of periodical colours can be made intelligible by the contemplation of such a trivial object, from that moment it becomes a noble instrument in the eye of correct judgment; and to blow a large, regular, and durable soap-bubble may become the serious and praise-worthy endeavour of a sage, while children stand round and scoff, or children of a larger growth hold up their hands in astonishment at such waste of time and trouble. To the natural philosopher there is no natural object unimportant or trifling. From the least of nature's works he may learn the greatest lessons. The fall of an apple to the ground may raise his thoughts to the laws which govern the revolutions of the planets in their orbits; or the situation of a pebble may afford him evidence of the state of the globe he inhabits, myriads of ages ago, before his species became its denizens.
And this, is, in fact, one of the great sources of delight which the study of natural science imparts to its votaries. A mind which has once imbibed a taste for scientific inquiry, and has learnt the habit of applying its principles readily to the cases which occur, has within itself an inexhaustible source of pure and exciting contemplations. One would think that Shakspeare had such a mind in view when he describes a contemplative man as finding

Source: Elements of Chemistry (1790), pp. xviii
Context: We must trust to nothing but facts: These are presented to us by Nature, and cannot deceive. We ought, in every instance, to submit our reasoning to the test of experiment, and never to search for truth but by the natural road of experiment and observation.

Mae and Bailey; p. 304
The Circle (2013)

Source: My Life with Martin Luther King Jr., Revised Edition (1969/1993), Ch. 6

Section 4.22 <!-- p. 246 -->
The Crosswicks Journal, A Circle of Quiet (1972)
Context: Gregory of Nyssa points out that Moses's vision of God began with the light, with the visible burning bush, the bush which was bright with fire and was not consumed; but afterwards, God spoke to him in a cloud. After the glory which could be seen with human eyes, he began to see the glory which is beyond and after light.
The shadows are deepening all around us. Now is the time when we must begin to see our world and ourselves in a different way.

To My People (July 4, 1973)

Source: Democracy and freedom. 1919, p. 37