“We are ignorant of the laws of variety-production; but we see it going on as a principle in nature”

1840s, Essays: First Series (1841), Self-Reliance
Context: Inasmuch as the soul is present, there will be power not confident but agent. To talk of reliance is a poor external way of speaking. Speak rather of that which relies, because it works and is. Who has more obedience than I masters me, though he should not raise his finger. Round him I must revolve by the gravitation of spirits. We fancy it rhetoric, when we speak of eminent virtue. We do not yet see that virtue is Height, and that a man or a company of men, plastic and permeable to principles, by the law of nature must overpower and ride all cities, nations, kings, rich men, poets, who are not.
This is the ultimate fact which we so quickly reach on this, as on every topic, the resolution of all into the ever-blessed ONE. Self-existence is the attribute of the Supreme Cause, and it constitutes the measure of good by the degree in which it enters into all lower forms. All things real are so by so much virtue as they contain.

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

[NewsBank, A12, 'Science Guy' Bill Nye defends evolution in debate, St. Paul Pioneer Press, Minnesota, February 5, 2014, Dylan Lovan, Associated Press]

Young India (24 September 1931); also in Teachings Of Mahatma Gandhi (1945), edited by Jag Parvesh Chander, p. 458 archive.org https://archive.org/stream/teachingsofmahat029222mbp#page/n463/mode/2up
1930s
Context: It is beyond my power to induce in you a belief in God. There are certain things which are self proved and certain which are not proved at all. The existence of God is like a geometrical axiom. It may be beyond our heart grasp. I shall not talk of an intellectual grasp. Intellectual attempts are more or less failures, as a rational explanation cannot give you the faith in a living God. For it is a thing beyond the grasp of reason. It transcends reason. There are numerous phenomena from which you can reason out the existence of God, but I shall not insult your intelligence by offering you a rational explanation of that type. I would have you brush aside all rational explanations and begin with a simple childlike faith in God. If I exist, God exists. With me it is a necessity of my being as it is with millions. They may not be able to talk about it, but from their life you can see that it is a part of their life. I am only asking you to restore the belief that has been undermined. In order to do so, you have to unlearn a lot of literature that dazzles your intelligence and throws you off your feet. Start with the faith which is also a token of humility and an admission that we know nothing, that we are less than atoms in this universe. We are less than atoms, I say, because the atom obeys the law of its being, whereas we in the insolence of our ignorance deny the law of nature. But I have no argument to address to those who have no faith.

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: Fashion, Faith, and Fantasy in the New Physics of the Universe (2016), Ch. 3, Fantasy, p. 311

"On the Horrors of the Slave Trade", speech delivered in the House of Commons (12 May 1789).

Pearls of Wisdom

Opening lines, p. 104
Variant translations:
What is God-given is called nature; to follow nature is called Tao (the Way); to cultivate the Way is called culture.
As translated by Lin Yutang in The Importance of Living (1937), p. 143
What is God-given is called human nature.
To fulfill that nature is called the moral law (Tao).
The cultivation of the moral law is called culture.
As translated by Lin Yutang in From Pagan to Christian (1959), p. 85
The Doctrine of the Mean