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 wall does not act at all, nor is capable of acting: the perceiving it is an act or operation in me.’ In short, the relation between perceptions and their objects is a unique relation, not to be confounded with the causal, the only causality involved being the percipient power that is in me.

Those Essays of Reid which treat of the constituents of the common sense that are implied in the Intellect power of man, appeared in the early summer of 1785. In September he informed Dr. Gregory of the opinion of Dr. Price, the most eminent contemporary English metaphysician:—'I had a letter from Dr. Price lately, thanking me for a copy of the Essays I ordered to be presented to him; which he has read, and calls a work of the first value; commends me particularly for treating Dr. Priestley so gently, who, he says, had been unhappily led to use me ill.' He then refers to his own health, which seems to have suffered from the mental strain, now relieved by the issue of his book:—'As you are so kind as to ask me about my distemper, I think it is almost quite gone, so as to give me no uneasiness. I abstain from fruit and malt liquor, and take a little port wine, mostly noon and night, not above two bottles a week when alone. The more I walk or ride, or even talk or read audibly, I am the better.'

Dr. Beattie writes thus to the Bishop of Chester in October:—

'Has your lordship read Dr. Reid’s Essays on the Intellectual Powers of Man? Those readers who have been conversant in the modern philosophy of mind, as it appears in the writings of Descartes, Malebranche, Locke, Berkeley, and Hume, will be much entertained with this work, which does great honour to the sagacity and patience of the author. It contains the principles of his Inquiry, laid down on a larger scale, and applied to a greater variety of subjects. Dr. Reid treats his