“One voice in the Great Conversation itself announces this modern point of view. In the closing paragraph of his An Enquiry Concerning Human Understanding, David Hume writes: "When we run over libraries, persuaded of these principles, what havoc must we make? If we take in our hand any volume… let us ask, Does it contain any abstract reasoning concerning quantity or number? No. Does it contain any experimental reasoning concerning matter of fact and existence? No. Commit it then to flames: for it can contain nothing but sophistry and illusion."… the positivists of our own day, would commit to burning or, what is the same, to dismissal from serious consideration… Those books… argue the case against the kind of positivism that asserts that everything except mathematics and experimental science is sophistry and illusion…. The Great Conversation… contains both sides of the issue.”

Its existence is, on the contrary, presupposed as forming what is fundamental in every one. So far as man's essential nature is concerned, nothing new is to be introduced into him. To try to do this would be as absurd as to give a dog printed writings to chew, under the idea that in this way you could put mind into it. It may happen that religion is awakened in the heart by means of philosophical knowledge, but it is not necessarily so. It is not the purpose of philosophy to edify, and quite as little is it necessary for it to make good its claims by showing in any particular case that it must produce religious feelings in the individual.
Lectures on the philosophy of religion, together with a work on the proofs of the existence of God. Translated from the 2d German ed. by E.B. Speirs, and J. Burdon Sanderson: the translation edited by E.B. Speirs. Published 1895 p. 4
Lectures on Philosophy of Religion, Volume 1 (1827)

1980s
Context: If you are not at all concerned with the world but only with your personal salvation, following certain beliefs and superstitions, following gurus, then I am afraid it will be impossible for you and the speaker to communicate with each other. …We are not concerned at all with private personal salvation but we are concerned, earnestly, seriously, with what the human mind has become, what humanity is facing. We are concerned as human beings, human beings who are not labelled with any nationality. We are concerned at looking at this world and what a human being living in this world has to do, what is his role?

Part 3, Section 12
A Treatise of Human Nature (1739-40), Book 1: Of the understanding

Source: The Fabric of Reality (1997), Ch.3

Source: A Choice of Gods (1972), Chapter 22 (p. 130)

Il n'est pas nécessaire de tenir les choses pour en raisonner.
Act V, scene iv. Reported in Hoyt's New Cyclopedia Of Practical Quotations (1922), p. 658-59.
Le Barbier de Séville (1773)

Source: Language, Truth, and Logic (1936), p. 47.

1780s, Letter to John Jay (1786)