A Treatise of Human Nature
David Hume (1739-1740)
Book 1, introduction, p. 5, ¶2
...tho' we must endeavour to render all other principles as universal as possible, by tracing up our experiments to the utmost, and explaining all effects from the simplest and fewest causes, 'tis still certain we cannot go beyond experience; and any hypothesis, that pretends to discover the ultimate original qualities of human nature, ought at first to be rejected as presumptuous and chimerical.
