Parelli Principle Number 8: Principles, Purpose and Time are the tools of teaching

Think about principles as being the horse, and that must come first. Purpose is the cart, and time is the driver. Now, we've come back full circle. We're talking about principles again, and now we have to go through each one of these principles and add in purpose so the horse knows the meaning.

First, we teach the horse principles; we build a foundation of things we want the horse to know. Then, we add purpose or a reason for doing what we want the horse to do. For example, we teach the horse to side-pass because someday we might want to open a gate while on the horse's back.