Three principles — the conformability of nature to herself, the applicability of the criterion of simplicity, and the "unreasonable effectiveness" of certain parts of mathematics in describing physical reality — are thus consequences of the underlying law of the elementary particles and their interactions. Those three principles need not be assumed as separate metaphysical postulates. Instead, they are emergent properties of the fundamental laws of physics.
I entirely agree with you, as to the ill tendency of the affected doubts of some philosophers, and fantastical conceit of others. I am even so far gone of late in this way of think, that I have quitted several of the sublime notions I had got in their schools for vulgar opinions. And I give it you on my word, since this revolt from Metaphysical notions to the plain dictates of nature and common sense, I find my understanding strangely enlightened, so that I can now easily comprehend a great many thing which before were all mystery and riddle.
The mathematical framework of quantum theory has passed countless successful tests and is now universally accepted as a consistent and accurate description of all atomic phenomena. The verbal interpretation, on the other hand – i.e., the metaphysics of quantum theory – is on far less solid ground. In fact, in more than forty years physicists have not been able to provide a clear Metaphysical model.fritjof capra
I have not been able to discover the cause of those properties of gravity from phenomena, and I frame no hypotheses; for whatever is not deduced from the phenomena is to be called a hypothesis, and hypotheses, whether Metaphysical or physical, whether of occult qualities or mechanical, have no place in experimental philosophy.isaac newton
Grosseteste's experimental method was quite different from a method of controlled experiment. Grosseteste made no use of such a method in his writings, deriving his conclusions on the basis of a mix of considerations, appealing to authority and everyday observation (the Latin “experimentum”). He made use of thought experiments and certain Metaphysical assumptions, such as the assumption of a principle of “least action.”
A Poet without Love were a physical and Metaphysical impossibility.thomas carlyle
To all appearance, the phenomena exhibited by the pendulum are not to be accounted for by impact: in fact, it is usually assumed that corresponding phenomena would take place if the earth and the pendulum were situated in an absolute vacuum, and at any conceivable distance from one another. If this be so, it follows that there must be two totally different kinds of causes of motion: the one impact a vera causa [true cause], of which, to all appearance, we have constant experience; the other, attractive or repulsive 'force' a Metaphysical entity which is physically inconceivable.thomas henry huxley
The phenomena of Mesmerism could be salvaged by physicians adopting a more rational and scientific approach, while avoiding the worst excesses of its Metaphysical speculations. Moreover, in a discussion of similar ideas propounded by the philosopher Francis Bacon, he specifically recommends that physicians, like Braid, should develop a ‘doctrine of the bond between mind and body’ (i.e., Braid’s “psycho-physiology”). Moreover, Stewart urges enquiry into ‘the effect of fixing and concentrating the attention, in giving to ideal [i.e., imaginary] objects the power of realities over the belief.
? "Absurd" originally means "out of harmony," in a musical context. Hence its dictionary definition: "out of harmony with reason or propriety; incongruous, unreasonable, illogical." In common usage, "absurd" may simply mean "ridiculous," but this is not the sense in which Camus uses the word, and in which it is used when we speak of the Theatre of the Absurd. In an essay on Kafka, Ionesco defined his understanding of the term as follows: "Absurd is that which is devoid of purpose. . . . Cut from his religious, Metaphysical, and transcendental roots, man is lost; all his actions become senseless, absurd, useless."martin esslin
The Metaphysical apologia at least betrayed the injustice of the established order through the incongruence of concept and reality. The impartiality of scientific language deprived what was powerless of the strength to make itself heard and merely provided the existing order with a neutral sign for itself. Such neutrality is more Metaphysical than metaphysics.theodor adorno
As far as learning was concerned, Marx was, and still is, incomparably more advanced than I. I knew nothing at that time of political economy, I had not yet rid myself of my Metaphysical observations... He called me a sentimental idealist and he was right; I called him a vain man, perfidious and crafty, and I also was right.karl marx
I have not as yet been able to discover the reason for these properties of gravity from phenomena, and I do not feign hypotheses. For whatever is not deduced from the phenomena must be called a hypothesis; and hypotheses, whether Metaphysical or physical, or based on occult qualities, or mechanical, have no place in experimental philosophy. In this philosophy particular propositions are inferred from the phenomena, and afterwards rendered general by induction.isaac newton
Ironclads and Maxim guns must be the ultimate arbiters of Metaphysical truth.bertrand russell