Berkeley advances valid arguments in favour of a certain important conclusion, though not quite in favour of the conclusion that he thinks he is proving. He thinks he is proving that all reality is mental; what he is proving is that we perceive qualities, not things, and that qualities are relative to the percipient.
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Bertrand Russell, in A History of Western Philosophy (1945), Ibid., Ch. XVI, "Berkeley", pp. 648-649.George Berkely
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Berkeley, as we have seen, thinks that there are logical reasons proving that only minds and mental events can exist. This view, on other grounds, is also held by Hegel and his followers. I believe this to be a complete mistake. Such a statement as “there was a time before life existed on this planet,” whether true or false, cannot be condemned on grounds of logic, any more than “there are multiplication sums which no one will have ever worked out.” To be observed, or to be a percept, is merely to have effects of certain kinds, and there is no logical reason why all events should have effects of these kinds.
George Berkely
He [Grotius] avoided another danger as serious as his precocity had been. He steered clear of the quicksands of useless scholarship, which had engulfed so many strong men of his time. The zeal of learned men in that period was largely given to knowing things not worth knowing, to discussing things not worth discussing, to proving things not worth proving. Grotius seemed plunging on, with all sails set, into these quicksands; but again his good sense and sober judgment saved him: he decided to bring himself into the current of active life flowing through his land and time, and with this purpose he gave himself to the broad and thorough study of jurisprudence.
Andrew Dickson White
Berkeley’s argument consists of two parts. On the one hand, he argues that we do not perceive material things, but only colours, sounds, etc., and that these are “mental” or “in the mind.” His reasoning is completely cogent as to the first point, but as to the second it suffers from the absence of any definition of the word “mental.” He relics, in fact, upon the received view that everything must be either material or mental, and that nothing is both.
George Berkely
Mr. Obama is proving the truism that the executive branch will use any power it is given and very likely abuse it.
Barack Obama
Faced with the choice between changing one's mind and proving that there is no need to do so, almost everyone gets busy on the proof.
John Kenneth Galbraith
Berkely, George
Berkey, Dennis
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