The form itself teaches the body how to move in an internal way.
Ideally, this is how your body should move in combat.

Form literally means 'shape'; and the aim is to re-shape your movements and structure into something martially viable.

The complexity of form means that a student has countless layers of skill to add to their form, and it will take decades to understand it deeply.
This learning process is what training an internal art is all about.