“For a philosophy based on faith is no longer philosophy. Perhaps it was this unresolved conflict which has prevented Western thought from ever coming to rest. Perhaps it is this conflict which is at the bottom of a kind of thought which is philosophic indeed but no longer Greek: modern philosophy. It is in trying to understand modern philosophy that we come across Machiavelli. Machiavelli is the only political thinker whose name has come into common use for designating a kind of politics, which exists and will continue to exist independently of his influence, a politics guided exclusively by considerations of 'expediency, which uses all means, fair or foul, iron or poison, for achieving its ends-its end being the ag­ grandizement of one's country or fatherland-but also using the father­ land in the service of the self-aggrandizement of the politician or statesman or one's party.”

Source: Knowledge and Human Interests, 1971, p. 4

Persecution and the Art of Writing (1952), Introduction

trans. Michael Chase, p. 271
La Philosophie comme manière de vivre (2001)

In these words Mr. A.P. Sinnett began his book, The Occult World, the first popular exposition of Theosophy, published thirty years ago.[1881]... Since then, many thousands have learned...yet to the majority its teachings are still unknown..
A Textbook of Theosophy (1912), Chapter One

Christian Mysticism (1899), Preface
Context: The phase of thought or feeling which we call Mysticism has its origin in that which is the raw material of all religion, and perhaps of all philosophy and art as well, namely, that dim consciousness of the beyond, which is part of our nature as human beings. Men have given different names to these "obstinate questionings of sense and outward things." We may call them, if we will, a sort of higher instinct, perhaps an anticipation of the evolutionary process; or an extension of the frontier of consciousness; or, in religious language, the voice of God speaking to us. Mysticism arises when we try to bring this higher consciousness into relation with the other contents of our minds.

Source: What is Political Philosophy (1959), p. 93

Section 4 : Sceptical Doubts Concerning The Operations of The Understanding
An Enquiry Concerning Human Understanding (1748)

George Santayana, in his letter to John Boynton Priestley, 15 September 1924
S - Z, George Santayana

Ueberhaupt aber bin ich allmälig der Meinung geworden, daß der erwähnte Nutzen der Kathederphilosophie von dem Nachtheil überwogen werde, den die Philosophie als Profession der Philosophie als freier Wahrheitsforschung, oder die Philosophie im Auftrage der Regierung der Philosophie im Auftrage der Natur und der Menschheit bringt.
Sämtliche Werke, Bd. 5, p. 151, E. Payne, trans. (1974) Vol. 1, p. 139
Parerga and Paralipomena (1851), On Philosophy in the Universities