The Life and Letters of Charles Darwin: Including an Autobiographical Chapter, Volumen1D. Appleton, 1888 |
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The Life and Letters of Charles Darwin: Including an ..., Volumen1 Charles Darwin Vista completa - 1887 |
The Life and Letters of Charles Darwin: Including an ..., Volumen1 Charles Darwin Vista completa - 1899 |
The Life and Letters of Charles Darwin: Including an ..., Volumen1 Charles Darwin Vista completa - 1887 |
Términos y frases comunes
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Pasajes populares
Página 370 - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.
Página 68 - I happened to read for amusement ' Malthus on Population ' ; and being well prepared to appreciate the struggle for existence which everywhere goes on from longcontinued observation of the habits of animals and plants, it at once struck me that under these circumstances favorable variations would tend to be preserved, and unfavorable ones to be destroyed. The result of this would be the formation of new species. Here then I had at last got a theory by which to work...
Página 86 - Therefore my success as a man of science, whatever this may have amounted to, has been determined, as far as I can judge, by complex and diversified mental qualities and conditions. Of these, the most important have been — the love of science — unbounded patience in long reflecting over any subject — industry in observing and collecting facts — and a fair share of invention as well as of common sense. With such moderate abilities as I possess, it is truly surprising that I should have influenced...
Página 372 - After five years' work I allowed myself to speculate on the subject, and drew up some short notes; these I enlarged in 1844 into a sketch of the conclusions which then seemed to me probable; from that period to the present day I have steadily pursued the same object.
Página 366 - Seeing this gradation and diversity of structure in one small, intimately related group of birds, one might really fancy that from an original paucity of birds in this archipelago, one species had been taken and modified for different ends.
Página 39 - Considering how fiercely I have been attacked by the orthodox, it seems ludicrous that I once intended to be a clergyman. ' Nor was this intention and my father's wish ever formally given up, but died a natural death when, on leaving Cambridge, I joined the Beagle as naturalist. If the phrenologists are to be trusted, I was well fitted in one respect to be a clergyman.
Página 29 - Nothing could have been worse for the development of my mind than Dr. Butler's school, as it was strictly classical, nothing else being taught, except a little ancient geography and history. The school as a means- of education to me was simply a blank.
Página 285 - But then with me the horrid doubt always arises whether the convictions of man's mind, which has been developed from the mind of the lower animals, are of any value or at all trustworthy. Would any one trust in the convictions of a monkey's mind, if there are any convictions in such a mind...
Página 69 - This problem is the tendency in organic beings descended from the same stock to diverge in character as they become modified. That they have diverged greatly is obvious from the manner in which species of all kinds can be classed under genera, genera under families, families under sub-orders and so forth ; and I can remember the very spot in the road, whilst in my carriage, when to my joy the solution occurred to me ; and this was long after I had come to Down.
Página 550 - That which we were looking for, and could not find, was a hypothesis respecting the origin of known organic forms, which assumed the operation of no causes but such as could be proved to be actually at work. We wanted, not to pin our faith to that or any other speculation, but to get hold of clear and definite conceptions which could be brought face to face with facts and have their validity tested. The 'Origin' provided us with the working hypothesis we sought.