Full Idea
A mood can focus into an emotion, and an emotion can blur out of focus into the non-specificity of mood.
Gist of Idea
Moods can focus as emotions, and emotions can blur into moods
Source
Peter Goldie (The Emotions [2000], 6 'Mood')
Book Reference
Goldie,Peter: 'The Emotions' [OUP 2002], p.148
A Reaction
I am struck by how the strong emotion of a vivid dream can remain as an inarticulate mood for the rest of the day.