Robert Ferguson, Progress of Metaphysics in Germany… (1827)
“ All that we are immediately conscious of, are ideas and impressions; consequently nothing but ideas and impressions exist. Following up this chain of reasoning with his unrivalled sagacity, Hume attacked the principle of causation; and by debasing our notion of cause into a mere habit of thought, he struck at the very root of all order and all religion. Whence is our notion of cause derived? said he, Is it from sensation? Surely not; for our senses only show that the two events, which we call cause and effect, follow each other, and never that they are necessarily connected. ”
