The rider must focus on the horse. In this way, the rider is empty in relation to the form of the horse. Through this relationship, the horse is able to respond fully, and achieve its potential. The meditator learns emptiness in order to clarify the relationship with form, and thereby discover the nonduality of emptiness and form. Then the mind begins to awaken.
p10, Battlecry of Freedom Ngakma Nor'dzin, Aro Books Worldwide, 2019, ISBN 978-1-898185-46-8