What does it mean to feel something?

We use that word, and its attached to a particular idea

thoughts are the voices and images inside our heads, an internal monologue wherein the brain simulates experience. Feelings are... like an inclination, a tendency or a hunch. A feeling can also have a distinct chemical presence in our bodies.

Can you think a feeling? If you were to think about fear, with enough intensity and willpower, would you be afraid?

Or is it required that you think about things related to fear, objects, entities, ideas that direct the mind towards the greater concept of terror?