To "Feel the music" is not a simple case of understanding an artists viewpoint, or relating to the lyrics, or even reading, deciphering and understanding the lines between the lines. It is not associated with understanding a life style that accompanies a type of music. "G"s don not feel their music. Neither, for the most part do juggalos or other such organizations/groups/"families".
To "Feel the music" is to have an extra-sensory response to a piece of auditory art. When listening to the music, you can taste and smell the meaning, It creates physical affects, often a pulsating feeling, or a vertigo like sensation. Is also has inexplicable affects not directly linked to a particular sense. you are "Feeling the music" when it produces quasi-hallucinogenic affects.
"Feeling the music" also requires that, in the wake of the perception, you feel drained, yet are just as energetic as beforehand.