Emotions feel physical. They feel like concrete, intrinsic things of their own accord. “Feeling” is something every human being on the planet can relate to.
Take catharsis, for example. It is a very real phenomenon. Crying literally seems to “release” emotions. Sadness, stress, and the like are literally made up, on the inside, of hormones in our bodies. What causes them? Our consciousness causes them.
When you get angry, it’s because of your mind. You have comprehended something that has triggered in your mind a feeling of anger, which underneath is just a combination of chemicals coursing through your blood.
Emotions are quite literally the link between consciousness and the physical underpinnings by which such consciousness arises.