Swami Vivekananda said: “Ay, therefore first know the secret of this Om, that you are the Om….”

Om is supreme, being Itself the Supreme. But Yama has made this seemingly obvious comment to convey the fact that Om is the supreme means to the realization of the Supreme. There is nothing higher than Om, nor is there any means of spiritual cultivation higher than Om. That is why Patanjali simply said: “Its repetition and meditation is the way.”