## Section II. Of the Origin of Ideas. According to Hume, where do ideas originate? What does Hume mean by "impressions" and "ideas"? People can imagine things, such as heat or a landscape, but it's never as vivid as actually experiencing them. >When we reflect on our past sentiments and affections, our thought is a faithful mirror, and copies its objects truly; but the colours which it employs are faint and dull, in comparison of those in which our original perceptions were clothed. There are two mental perceptions: 1. **Impressions**: The direct, vivid perceptions of our senses such as sight, hearing, and even feelings like love and hate. 2. **Ideas**: The less vivid and lively perceptions when we reflect or think on our impressions. Though our imagination seems to have unbounded freedom, it's constrained to the manipulation and combination of the building blocks of our impressions. For example, when we think of a gold mountain, we're combining the ideas of gold and mountain which we were already acquainted with. The idea of God, an infinitely wise and good being, is simply an amplified version of the qualities we observe in ourselves and others. A person who lacks a sensory perception, such as a blind or deaf person, also lacks the corresponding ideas: a blind person cannot imagine colors. However, if you repair the sensory organ, they are able to have ideas related to that perception. This also extends to emotions: a mild-mannered person cannot fully understand cruelty. ## Section III. Of the Association of Ideas. How are ideas associated according to Hume? What are the three principles of connection among ideas? ## Section IV. Sceptical Doubts Concerning the Operations of the Understanding. What exactly is Hume doubting? What does Hume mean by "understanding"? What are the two types of knowledge Hume argues for? ### Section IV. Part 1. ### Section IV. Part 2. ## Section V. Sceptial Solution of these Doubts. Does Hume propose how to resolve our doubts? How? What are Hume's thoughts on induction? ### Section V. Part 1. ### Section V. Part 2.