The phrase "to feel the music" means to experience and connect with the emotions, rhythm or beat of a piece of music. It is an expression used to describe how someone can be moved by the sound, melody, harmony or lyrics of a song in such a way that they physically sense it through their body. When people say "I feel the music," what they mean is that they are able to connect with the emotions conveyed through the rhythm and tempo of the piece, allowing them to experience an almost physical sensation as if they were part of the song itself.