I did the exercise of the worst feeling and I came up with the worst feeling I could imagine was pain.

I would consider pain as a feeling, because I could describe it; my mind is frozen or on fire, my body might feel stiff or want to curl up depending on the circumstances. It affects both my body and my mind. But does it start from the body or the mind? In other words, is it a feeling or a sensation? Could it be both? Can we use sensation as an F line? I am very new at the model.

Thank you for your help.