I have been accused of a habit of changing my opinions ... I am not myself in any degree ashamed of having changed my opinions. What physicist who was already active in 1900 would dream of boasting that his opinions had not changed during the last half century? In science men change their opinions when new knowledge becomes available; but philosophy in the minds of many is assimilated rather to theology than to science. ... The kind of philosophy that I value and have endeavoured to pursue is scientific, in the sense that there is some definite knowledge to be obtained and that new discoveries can make the admission of former error inevitable to any candid mind. For what I have said, whether early or late, I do not claim the kind of truth which theologians claim for their creeds. I claim only, at best, that the opinion expressed was a sensible one to hold at the time when it was expressed. I should be much surprised if subsequent research did not show that it needed to be modified. I hope, therefore, that whoever uses this dictionary will not suppose the remarks which it quotes to be intended as pontifical pronouncements, but only as the best I could do at the time towards the promotion of clear and accurate thinking. Clarity, above all, has been my aim.
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Preface to The Bertrand Russell Dictionary of Mind, Matter and Morals (1952) edited by Lester E. Denonn.Bertrand Russell
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A man who has made up his mind on a given subject twenty-five years ago and continues to hold his political opinions after he has been proved to be wrong is a man of principle; while he who from time to time adapts his opinions to the changing circumstances of life is an opportunist.
A. P. Herbert
There are two threats to reason, the opinion that one knows the truth about the most important things and the opinion that there is no truth about them. Both of these opinions are fatal to philosophy; the first asserts that the quest for truth is unnecessary, while the second asserts that it is impossible. The Socratic knowledge of ignorance, which take to be the beginning point of all philosophy, defines the sensible middle ground between two extremes.
Allan Bloom
Liberal education, which consists in the constant intercourse with the greatest minds, is a training in the highest form of modesty. … It is at the same time a training in boldness. … It demands from us the boldness implied in the resolve to regard the accepted views as mere opinions, or to regard the average opinions as extreme opinions which are at least as likely to be wrong as the most strange or least popular opinions
Leo Strauss
Everybody has opinions: I have them, you have them. And we are all told from the moment we open our eyes, that everyone is entitled to his or her opinion. Well, that’s horsepuckey, of course. We are not entitled to our opinions; we are entitled to our informed opinions. Without research, without background, without understanding, it’s nothing. It’s just bibble-babble. It’s like a fart in a wind tunnel, folks.
Harlan Ellison
Windelband, the historian of philosophy, in his essay on the meaning of philosophy (Was ist Philosophie? in the first volume of his Präludien) tells us that "the history of the word 'philosophy' is the history of the cultural significance of science." He continues: "When scientific thought attains an independent existence as a desire for knowledge, it takes the name of philosophy; when subsequently knowledge as a whole divides into its various branches, philosophy is the general knowledge of the world that embraces all other knowledge. As soon as scientific thought stoops again to becoming a means to ethics or religious contemplation, philosophy is transformed into an art of life or into a formulation of religious beliefs. And when afterwards the scientific life regains its liberty, philosophy acquires once again its character as an independent knowledge of the world, and in so far as it abandons the attempt to solve this problem, it is changed into a theory of knowledge itself." Here you have a brief recapitulation of the history of philosophy from Thales to Kant, including the medieval scholasticism upon which it endeavored to establish religious beliefs. But has philosophy no other office to perform, and may not its office be to reflect upon the tragic sense of life itself, such as we have been studying it, to formulate this conflict between reason and faith, between science and religion, and deliberately to perpetuate this conflict?
Miguel de Unamuno
Russell, Bertrand
Russell, Bill
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