Imagining different aspects of your "self" generating emotional responses helps you understand where your emotions come from and how they operate.
Remember that emotions are automatic responses to change: physiological reactions that help us adapt to certain types of situations.
All three aspects of your personality generate or transform your emotional responses. The responses you experience reflect the distinct nature of each of your three inner aspects.
Your primitive aspect churns out your basic emotions:
fear, sorrow, disgust, anger and joy
Your social aspect churns out your interpersonal emotions:
jealousy, grief, scorn, envy, and love.
Your reasonable aspect impacts your basic emotions churning out:
obsession, depression, intolerance, prejudice, and self-esteem
Each aspect of your "self" can have its own nuanced response to a situation.