We can never be induced to believe any matter of fact, except where its cause, or its effect, is present to us; but what the nature is of that belief, which arises from the relation of cause and effect, few have had the curiosity to ask themselves.
 David Hume, A Treatise of Human Nature (1738). copy citation

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Author David Hume
Source A Treatise of Human Nature
Topic belief curiosity
Date 1738
Language English
Reference
Note
Weblink http://www.gutenberg.org/files/4705/4705-h/4705-h.htm

Context

“But I have found by experience, that some of my expressions have not been so well chosen, as to guard against all mistakes in the readers; and it is chiefly to remedy this defect, I have subjoined the following appendix. We can never be induced to believe any matter of fact, except where its cause, or its effect, is present to us; but what the nature is of that belief, which arises from the relation of cause and effect, few have had the curiosity to ask themselves. In my opinion, this dilemma is inevitable. Either the belief is some new idea, such as that of reality or existence, which we join to the simple conception of an object, or it is merely a peculiar feeling or sentiment.” source