Feelings are emotions induced by the energy of True Self.
When True Self is stimulated by your character’s interactions and reflections, it sends off energies to your physical body. These energies (emotions) are what give you feelings in the physical.
If stimulated to an extreme, the physical body will experience the feeling of pain, while emotionally feeling consumed.
For instance, a slight tickle can sometimes feel good. When excessively tickled, you start feeling uncomfortable.