When we listen with everything we've got, when we listen with our mind body and soul, when we listen until nothing else exists except the gong; then we become one with everything.
When we 'think' we have achieved a higher state, when we feel ready to declare to the world that we are enlightened, then that is the point at which we have lost it. The connection with the infinite cosmos can only occur when our ego is completely removed. It comes when our `I am` state, the observer within, is wholely present. Similarly, great people cannot become teachers or yogis or spiritual leaders by stating what they are, they can only just 'be'.
The gong helps with a momentary connection with that point of oneness by being a point of focus that removes the ego. The gong is a portal through which you can only pass when the mind is quiet.
From a lecture regarding Kundalini Yoga -
"In shuniaa you become zero, you reduce everything to nothing: “I am nothing. Everything is nothing. There’s nothing to be nothing.” The moment you become that, then everything radiates from you."
Lecture by :
Siri Singh Sahib Bhai Sahib Harbhajan Singh Khalsa Yogi Ji
John and June Shapter, Healing Sound Practitioners and founders of The Chiron Institute UK