Emotion analogy.

...we perceive a feeling in much the same fashion as we perceive a tree: something affects a nerve ending near the surface of the body, which causes a series of electrochemical reactions to travel up the nerve pathway to the brain, where a picture of a tree or the sensation of a feeling mysteriously appears in consciousness. When we're talking about an emotion type of feeling, some stimulus had produced a reaction that may then be felt as located in some area of the body, but again the feeling appears mysteriously in consciousness. In any case, since they're observable, we're not our feelings.