Pure Perception

I've read here , that: > As Dza Patrul Rinpoche candidly says (AKC 15): Ritual sessions four > times a day without the generation and completion stages, pounding > drums and clashing cymbals without reminding ourselves of pure > perception, droning mantras without any concentration: all that gets > us no further on the path to liberation. What is meant by "pure perception"? As I understood it, it means recognize Shunyata – but to recognize this, you need to be enlightened (?). **As a lay practitioner at the beginning of the path what is meant by "pure perception"?**