Philosopher David Hume on the Association of Ideas Summary
SECTION III: the Association of Ideas
18-19. There is a connection between different thoughts or ideas of the mind and their appearance in memory or imagination. Even in fleeting thoughts and loose conversation their connections can be observed. This is the case whatever language is used: different ideas are connected. There are three principles of connection among ideas: Resemblance, Contiguity (relationship in time or place) and Cause and effect. These can be illustrated by a picture leading our thoughts to the original (Resemblance), by one room in a building leading us to a discourse concerning the others (Contiguity), and by the looking at a wound leading our thoughts to the pain which followed it (Cause and Effect). On examination, we may become assured that these three form the complete list of connections.