Full Idea
Emotions are the life force of the soul, the source of most of our values (not all: there is always hunger, thirst, and fatigue).
Gist of Idea
Emotions are our life force, and the source of most of our values
Source
Robert C. Solomon (The Passions [1976], Intro.4)
Book Reference
Solomon,Robert C.: 'The Passions (1993 ed)' [Hackett 1993], p.15
A Reaction
I am beginning to worry that Solomon's account is too individual and subjective. My personal values may derive from my emotions, but I think human and social values are based much more on objective observations and facts. We are social, not solipsists.