Page "An Enquiry Concerning Human Understanding" Paragraph 6

Next, Hume discusses the distinction between impressions and ideas.

By " impressions ", he means sensations, while by " ideas ", he means memories and imaginings.

According to Hume, the difference between the two is that ideas are less vivacious than impressions.

For example, the idea of the taste of an orange is far inferior to the impression ( or sensation ) of actually eating one.

Writing within the tradition of empiricism, he argues that impressions are the source of all ideas.