“He remained heartbroken, which meant one of two things: either his love was pure and true and earthshakingly significant; or he was addicted to feeling forlorn, he liked being heartbroken.”

The Twelve Beguines

The Philosophy of Physical Science (1938)
Context: Let us suppose that an ichthyologist is exploring the life of the ocean. He casts a net into the water and brings up a fishy assortment. Surveying his catch, he proceeds in the usual manner of a scientist to systematise what it reveals. He arrives at two generalisations: No sea-creature is less than two inches long. (2) All sea-creatures have gills. These are both true of his catch, and he assumes tentatively that they will remain true however often he repeats it.
In applying this analogy, the catch stands for the body of knowledge which constitutes physical science, and the net for the sensory and intellectual equipment which we use in obtaining it. The casting of the net corresponds to observation; for knowledge which has not been or could not be obtained by observation is not admitted into physical science.
An onlooker may object that the first generalisation is wrong. "There are plenty of sea-creatures under two inches long, only your net is not adapted to catch them." The icthyologist dismisses this objection contemptuously. "Anything uncatchable by my net is ipso facto outside the scope of icthyological knowledge. In short, what my net can't catch isn't fish." Or — to translate the analogy — "If you are not simply guessing, you are claiming a knowledge of the physical universe discovered in some other way than by the methods of physical science, and admittedly unverifiable by such methods. You are a metaphysician. Bah!"

Source: The Rime of the Ancient Mariner

Laurie Magnus A General Sketch of European Literature in the Centuries of Romance (London: Kegan Paul, Trench, Trubner & Co., 1918) pp. 27-28.
Praise

"Einstein's Reply to Criticisms" (1949), The World As I See It (1949)
Context: When we survey our lives and endeavors we soon observe that almost the whole of our actions and desires are bound up with the existence of other human beings. We see that our whole nature resembles that of the social animals. We eat food that others have grown, wear clothes that others have made, live in houses that others have built. The greater part of our knowledge and beliefs has been communicated to us by other people through the medium of a language which others have created. Without language our mental capacities would be poor indeed, comparable to those of the higher animals; we have, therefore, to admit that we owe our principal advantage over the beasts to the fact of living in human society. The individual, if left alone from birth would remain primitive and beast-like in his thoughts and feelings to a degree that we can hardly conceive. The individual is what he is and has the significance that he has not so much in virtue of his individuality, but rather as a member of a great human society, which directs his material and spiritual existence from the cradle to the grave.

Source: The Last Camel Died at Noon

"Oedipus Rex"
An Evening (Wasted) With Tom Lehrer (1959)

Hagakure (c. 1716)

The Fantastic Imagination (1893)
Context: "But a man may then imagine in your work what he pleases, what you never meant!"
 Not what he pleases, but what he can. If he be not a true man, he will draw evil out of the best; we need not mind how he treats any work of art! If he be a true man, he will imagine true things: what matter whether I meant them or not? They are there none the less that I cannot claim putting them there! One difference between God's work and man's is, that, while God's work cannot mean more than he meant, man's must mean more than he meant. For in everything that God has made, there is layer upon layer of ascending significance; also he expresses the same thought in higher and higher kinds of that thought: it is God's things, his embodied thoughts, which alone a man has to use, modified and adapted to his own purposes, for the expression of his thoughts; therefore he cannot help his words and figures falling into such combinations in the mind of another as he had himself not foreseen, so many are the thoughts allied to every other thought, so many are the relations involved in every figure, so many the facts hinted in every symbol. A man may well himself discover truth in what he wrote; for he was dealing all the time with things that came from thoughts beyond his own.