Emotion

From Wikipedia on Emotion:

• 1 Etymology
• 2 Defining Emotion
• 3 Emotion Classification
• 4 Theoretical Traditions in Emotion Research
• 4.1 Somatic Theories of Emotion
• 4.1.1 The James-Lange Theory
• 4.1.2 The Perceptual Theory
• 4.2 Cognitive Theories of Emotion
• 4.2.1 The Cannon-Bard Theory
• 4.2.2 The Two Factor Theory
• 4.2.3 The Component Process Model
• 5 Disciplinary approaches to Emotions
• 5.1 Evolutionary Biology of Emotions
• 5.2 Sociology of Emotions
• 5.3 Psychotherapy of Emotions
• 5.4 Computer Science of Emotions
• 6 Notable theorists of emotions
• 7 Closely related terms

The Bhagavad Gita, a 19th century manuscript.