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“Philosophical arguments are either valid or invalid. They aren’t true – or false for that matter. Only the premises (and the conclusion), which are factual claims about the world, can be true or false. Confusingly perhaps, a philosophical argument can be valid even if its premises are false. Philosophers call such arguments valid but “unsound.” Informal, everyday arguments tend to mix up premises and conclusions, and often in the process the distinction between true facts based on evidence and not necessarily true opinions (conclusions) based on reasoning gets lost.”

“Philosophical confusions of the sort Wittgenstein is talking about here are not due to the mere transgression of some grammatical rule. Rather, they are due to the tacit hovering between different forms of use - uses that by themselves are perfectly all right. Now in order to treat such confusions, grammatical rules can be quite useful, despite - or even precisely because of - their circular character. For the use of these rules in such cases is not to prescribe particular uses and proscribe others. Indeed, such attempts at prescription and proscription would be counterproductive: for the problem is not that there are correct and incorrect ways of using the relevant words. Rather, the trouble is that two different uses are being conflated - so what we need is to get clear about the differences between them. What we need rules for is to capture the relevant patterns of use, describe them, and thereby make it clear that the confusion is due to an attempt to play two different games at the same time. This requires entering precisely into the sort of dialogue that Hacker's conception of grammatical rules seems to prevent, or at least make unnecessary - a dialogue that does not presuppose that the relevant 'pieces' and 'games' have already been identified but is genuinely open to the possibility of using language in a multitude of meaningful ways.”

“Philosophical questions are not by their nature insoluble. They are, indeed, radically different from scientific questions, because they concern the implications and other interrelations of ideas, not the order of physical events; their answers are interpretations instead of factual reports, and their function is to increase not our knowledge of nature, but our understanding of what we know.”

“Philosophical studies are beset by one peril, a person easily brings himself to think that he thinks; and a smattering of science encourages conceit. He is above his companions. A hieroglyphic is a spell. The gnostic dogma is cuneiform writing to the million. Moreover, the vain man is generally a doubter. It is Newton who sees himself in a child on the sea shore, and his discoveries in the colored shells.”

“Philosophically, I am a logical empiricist and materialist, and I am a veteran of over 400 radio and TV interviews and debates. I am a Christ-myth advocate and am pursuing research into how Christianity could have begun without a historical Jesus of Nazareth. I am married with one daughter and three grandchildren.”

“Philosophiren, says Novalis, ist dephlegmatisiren vivificiren. The service of philosophy, of speculative culture, towards the human spirit is to rouse, to startle it into sharp and eager observation. Every moment some form grows perfect in hand or face; some tone on the hills or the sea is choicer than the rest; some mood of passion or insight or intellectual excitement is irresistibly real and attractive for us,—for that moment only. Not the fruit of experience, but experience itself, is the end. A counted number of pulses only is given to us of a variegated, dramatic life. How may we see in them all that is to be seen in them by the finest senses? How shall we pass most swiftly from point to point, and be present always at the focus where the greatest number of vital forces unite in their purest energy? To burn always with this hard, gemlike flame, to maintain this ecstasy, is success in life. In a sense it might even be said that our failure is to form habits: for, after all, habit is relative to a stereotyped world, and meantime it is only the roughness of the eye that makes any two persons, things, situations, seem alike. While all melts under our feet, we may well catch at any exquisite passion, or any contribution to knowledge that seems by a lifted horizon to set the spirit free for a moment, or any stirring of the senses, strange dyes, strange colours, and curious odours, or work of the artist's hands, or the face of one's friend. Not to discriminate every moment some passionate attitude in those about us, and in the brilliancy of their gifts some tragic dividing of forces on their ways, is, on this short day of frost and sun, to sleep before evening. With this sense of the splendour of our experience and of its awful brevity, gathering all we are into one desperate effort to see and touch, we shall hardly have time to make theories about the things we see and touch. What we have to do is to be for ever curiously testing new opinions and courting new impressions, never acquiescing in a facile orthodoxy of Comte, or of Hegel, or of our own. Philosophical theories or ideas, as points of view, instruments of criticism, may help us to gather up what might otherwise pass unregarded by us. "Philosophy is the microscope of thought." The theory or idea or system which requires of us the sacrifice of any part of this experience, in consideration of some interest into which we cannot enter, or some abstract theory we have not identified with ourselves, or what is only conventional, has no real claim upon us.”

“Philosophy - reduced, as we have seen, to philosophical discourse - develops from this point on in a different atmosphere and environment from that of ancient philosophy. In modern university philosophy, philosophy is obviously no longer a way of life, or a form of life - unless it be the form of life of a professor of philosophy.”

“Philosophy [nature] is written in that great book which ever is before our eyes -- I mean the universe -- but we cannot understand it if we do not first learn the language and grasp the symbols in which it is written. The book is written in mathematical language, and the symbols are triangles, circles and other geometrical figures, without whose help it is impossible to comprehend a single word of it; without which one wanders in vain through a dark labyrinth.”

“Philosophy aims at the logical clarification of thoughts. Philosophy is not a body of doctrine but an activity. A philosophical work consists essentially of elucidations. Philosophy does not result in 'philosophical propositions', but rather in the clarification of propositions. Without philosophy thoughts are, as it were, cloudy and indistinct: its task is to make them clear and to give them sharp boundaries.”

“Philosophy and science have not always been friendly toward the idea of God, the reason being they are dedicated to the task of accounting for things and are impatient with anything that refuses to give an account of itself. The philosopher and the scientist will admit that there is much that they do not know; but that is quite another thing from admitting there is something which they can never know, which indeed they have no technique for discovering.”