“All things change, creeds and philosophies and outward systems — but God remains.”

Speech (May 28, 1948) at the Scottish Unionist Conference, Perth, Scotland, in Never Give In! : The best of Winston Churchill’s Speeches (2003), Hyperion, p. 446 ISBN 1401300561
Post-war years (1945–1955)

Source: Some Mistakes of Moses

Introductory
The Grammar of Science (1900)

Source: My Several Worlds (1954), p. 244
Context: Chinese were born, it seemed to me, with an accumulated wisdom, a natural sophistication, an intelligent naiveté, and unless they were transplanted too young, these qualities ripened in them. To talk even with a farmer and his family, none of whom could read or write, was often to hear a philosophy at once sane and humorous. If ever I am homesick for China, now that I am home in my own country, it is when I discover here no philosophy. Our people have opinions and creeds and prejudices and ideas but as yet no philosophy.

Source: Seraphita (1835), Ch. 4: The Clouds of the Sanctuary.

Precious Remedies Against Satan's Devices, 1652

Introduction to the Bhagavad-Gita (1944)
Context: I have tried to show that the Perennial Philosophy and its ethical corollaries constitute a Highest Common Factor, present in all the major religions of the world. To affirm this truth has never been more imperatively necessary than at the present time. There will never be enduring peace unless and until human beings come to accept a philosophy of life more adequate to the cosmic and psychological facts than the insane idolatries of nationalism and the advertising man’s apocalyptic faith in Progress towards a mechanized New Jerusalem. All the elements of this philosophy are present, as we have seen, in the traditional religions. But in existing circumstances there is not the slightest chance that any of the traditional religions will obtain universal acceptance. Europeans and Americans will see no reason for being converted to Hinduism, say, or Buddhism. And the people of Asia can hardly be expected to renounce their own traditions for the Christianity professed, often sincerely, by the imperialists who, for four hundred years and more, have been systematically attacking, exploiting, and oppressing, and are now trying to finish off the work of destruction by “educating” them. But happily there is the Highest Common Factor of all religions, the Perennial Philosophy which has always and everywhere been the metaphysical system of prophets, saints and sages. It is perfectly possible for people to remain good Christians, Hindus, Buddhists, or Moslems and yet to be united in full agreement on the basic doctrines of the Perennial Philosophy.

Letter to Francis Hopkinson (13 March 1789)
1780s
Context: You say that I have been dished up to you as an antifederalist, and ask me if it be just. My opinion was never worthy enough of notice to merit citing; but since you ask it I will tell it you. I am not a Federalist, because I never submitted the whole system of my opinions to the creed of any party of men whatever in religion, in philosophy, in politics, or in anything else where I was capable of thinking for myself. Such an addiction is the last degradation of a free and moral agent. If I could not go to heaven but with a party, I would not go there at all. Therefore I protest to you I am not of the party of federalists. But I am much farther from that than of the Antifederalists.