The Principles of Psychology, Svazek 2

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D. Appleton and Company, 1894
 

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Strana 321 - ... particular shape and colour. Likewise the idea of man that I frame to myself, must be either of a white } or a black, or a tawny, a straight or a crooked, a tall or a low, or a middle-sized man. I cannot by any effort of thought conceive the abstract idea above described. And it is equally impossible for me to form the abstract idea of motion distinct from the body moving, and which is neither swift nor slow, curvilinear nor rectilinear; and the like may be said of all other abstract general...
Strana 321 - I can imagine a man with two heads or the upper parts of a man joined to the body of a horse. I can consider the hand, the eye, the nose, each by itself abstracted or separated from the rest of the body. But then whatever hand or eye I imagine, it must have some particular shape and colour.
Strana 342 - Propositions of this kind are discoverable by the mere operation of thought, without dependence on what is anywhere existent in the universe. Though there never were a circle or triangle in nature, the truths demonstrated by Euclid would for ever retain their certainty and evidence.
Strana 246 - Perception proper and Sensation proper exist only as they coexist, in the degree or intensity of their existence, they are always found in an inverse ratio to each other.
Strana 186 - E, &c., are known by the number of intervening states. Imagine now that instead of these small motions separately made, the eye is moved with ordinary rapidity ; so that the image of the dot sweeps over the whole series A to Z in an extremely short time.
Strana 328 - Here, therefore, we may divide all the perceptions of the mind into two classes or species, which are distinguished by their different degrees of force and vivacity. The less forcible and lively are commonly denominated THOUGHTS or IDEAS.
Strana 46 - THEOREM The greater side of every triangle has the greater angle opposite to it. Let ABC be a triangle, of which the side AC is greater than the side AB : the angle ABC is also greater than the angle ACB.
Strana 313 - Nature, by an absolute and uncontrollable necessity, has determined us to judge as well as to breathe and feel...
Strana 58 - The second is the principle of negative syllogisms and is to this effect: that a thing which co-exists with another thing, with which other a third thing does not coexist, is not co-existent with that third thing.
Strana 329 - By the term impression, then, I mean all our more lively perceptions, when we hear, or see, or feel, or love, or hate, or desire, or will. And impressions are distinguished from ideas, which are the less lively perceptions of which we are conscious when we reflect on any of those sensations or movements above mentioned.

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