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Although the formation of our fancy breeds does not serve to advance the development of those intellectual features which are the most interesting part of our dogs, the experiments have served to show the amazing physical plasticity of this species under the conditions of long domestication.
And just before it she was a girl and nothing more; with all girl's diffidence, a girl's self-distrust, a girl's abnegation, a girl's plasticity. In the more purely personal aspect of her enterprise Stephen's effort was more conscious. It is hardly possible for a pretty woman to seek in her study of perfection the aid of her mirror and to be unconscious of her aims.
It is a statement of the fact that conduct is modifiable and that such modifications may become permanent. The fact of learning depends physiologically on the plasticity of the nervous system. The neurones, particularly those concerned with intellectual life, are not only sensitive to nerve currents but are modified by them.
The plasticity of the world as it appears to the mind of the poet is clearly evidenced by the swarm of images which present themselves to the poet's consciousness. In the re-presentation of these pictures to us the poet is forced, of course, to use verbal images.
"All mammals and most birds have a period of babyhood that is not very long, but it is on the whole longer with the most intelligent creatures. The period of helpfulness is a period of plasticity. The creature's career is no longer exclusively determined by heredity.
As we have seen, the acquiring of habits is due to an original plasticity of our natures: to our ability to vary responses till we find an appropriate and efficient way of acting. Routine habits, and habits that possess us instead of our possessing them, are habits which put an end to plasticity. They mark the close of power to vary.
The new singer must learn how to move gracefully and awkwardly, how to make both fantastic and realistic gestures, always unconventional gestures, because conventions stamp the imitator. She must peer into every period, glance at every nation. Every nerve centre must be prepared to express any adumbration of plasticity.
This readjustment, on which real improvement hangs and which alone makes "experience" useful, does not correspond to the intensity or repetition of the pains endured; it corresponds rather to such a plasticity in the organism that the painful conflict is no longer produced.
Sympathetic pain, all I know of it I remember as a thing I used to suffer from years ago. I wanted it was the one thing I wanted to find out the extreme limit of plasticity in a living shape." "But," said I, "the thing is an abomination " "To this day I have never troubled about the ethics of the matter," he continued. "The study of Nature makes a man at last as remorseless as Nature.
The great timepiece of Nature was wound up at the beginning, and is running down. In the earlier stages of great plasticity and exuberant power, diversification took place freely, but only in definite lines, and species and types multiplied.
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