Theory...

While music is an art form, much of its foundation lies in structures reflected from science and mathematics. Theory analysis exposes patterns in music that make for a deeper understanding of how music is created and put together.

...in Action

Analysis on its own is fascinating, but it also functions in a practical manner: enabling quick anticipation of what comes next in a piece of music, to see and then play patterns that span hundreds of years, which speeds up learning and greatly reinforces memory.